path-util: trivial cleanup for find_executable_full()

core: clean up Set/LoadCredential= parsers

Make logging consistent, plus introduce helper function
for adding creds to ExecContext.set_credential too.

mkosi: Bump device timeout even more

I still manage to hit it in some cases so let's bump again.

Merge pull request #33533 from neighbourhoodie/tests/dns-synthesize

resolved: tests for dns_synthesize_family() and dns_synthesize_protocol()

resolved: tests for dns_synthesize_answer()

sd-dhcp-server: persist hardware addresses in leases

Merge pull request #33531 from neighbourhoodie/tests/dns-zone

resolved: tests for dns_zone_lookup()

resolved: tests for dns_zone_remove_rrs_by_key()

resolved: tests for dns_zone_remove_rr()

resolved: tests for dns_zone_put()

Merge pull request #33530 from neighbourhoodie/tests/dns-search-domain

resolved: tests for dns_search_domain_find()

resolved: tests for search domain marking and unlinking

resolved: extract function for checking search domains

resolved: tests for dns_search_domain_unlink()

resolved: tests for dns_search_domain_new()

Merge pull request #33529 from neighbourhoodie/tests/dns-link

Tests for DNS Link functions

Merge pull request #33528 from neighbourhoodie/tests/dns-answer

resolved: tests for dns_answer_order_by_scope()

resolved: tests for dns_answer_has_dname_for_cname()

resolved: tests for dns_answer_dump()

resolved: tests for dns_answer_{copy,move}_by_key()

resolved: tests for dns_answer_remove_by_answer_keys()

resolved: tests for dns_answer_remove_by_{key,rr}()

resolved: tests for dns_answer_merge() and dns_answer_extend()

resolved: tests for dns_answer_find_soa()

resolved: tests for dns_answer_add(), dns_answer_match_key()

Merge pull request #33526 from neighbourhoodie/tests/dns-question

resolved: tests for dns_question_merge()

resolved: tests for dns_question_first_name()

resolved: tests for dns_question_dump()

resolved: tests for dns_question_cname_redirect()

resolved: tests for dns_question_is_equal()

resolved: tests for dns_question_is_valid_for_query()

resolved: tests for dns_question_matches_cname_or_dname()

resolved: tests for dns_question_matches_rr()

resolved: tests for dns_question_new_service()

resolved: tests for dns_question_new_reverse()

resolved: tests for dns_question_new_address()

resolved: tests for dns_question_add()

Merge pull request #33525 from neighbourhoodie/tests/dns-rr

resolved: tests for dns_resource_record_source(), dns_resource_record_is_synthetic(), dns_resource_record_signer(), dns_resource_record_is_signer()

resolved: tests for dns_resource_record_to_wire_format()

Note this function does not produce compressed domain names in the RDATA
when serializing the RR.

resolved: tests for dns_resource_record_to_string()

resolved: tests for dns_resource_key_{to,from}_json()

This test doesn't check the generated JSON data in detail, it simply
tests that round-tripping an RR key through the JSON representation
preserves its data.

resolved: tests for dns_resource_record_clamp_ttl()

resolved: tests for dns_resource_record_equal(); LOC records

resolved: tests for dns_resource_record_equal(); SVCB records

resolved: tests for dns_resource_record_equal(); RRSIG records

resolved: tests for dns_resource_record_equal(); NAPTR records

resolved: tests for dns_resource_record_equal(); SRV records

resolved: tests for dns_resource_record_equal(); TXT records

resolved: tests for dns_resource_record_equal(); DNAME records

resolved: tests for dns_resource_record_equal(); MX records

resolved: tests for dns_resource_record_equal(); HINFO records

resolved: tests for dns_resource_record_equal(); PTR records

resolved: tests for dns_resource_record_equal(); SOA records

resolved: tests for dns_resource_record_equal(); CNAME records

resolved: tests for dns_resource_record_equal(); NS records

resolved: tests for dns_resource_record_equal(); A and AAAA records

resolved: tests for dns_resource_record_equal(); general cases

These tests cover comparisons between RR objects that are not class- or
type-specific, i.e. they don't check any of the RDATA fields.

resolved: tests for dns_resource_record_new_address(), dns_resource_record_new_reverse()

resolved: tests for dns_resource_key_reduce()

resolved: tests for dns_resource_key_to_string()

resolved: tests for dns_resource_key_match_cname_or_dname(), dns_resource_key_match_soa()

resolved: tests for dns_resource_key_equal() and dns_resource_key_match_rr()

resolved: tests for dns_resource_key_is_{address, dnssd_ptr, dnssd_two_label_ptr}

resolved: tests for dns_resource_key_new_append_suffix()

resolved: tests for dns_resource_key_new() and dns_resource_key_new_redirect()

resolved: test for DNS_RESOURCE_RECORD_RDATA()

Merge pull request #33524 from neighbourhoodie/tests/dns-packet

Tests for DNS packet parsing/serialising

Merge pull request #33804 from keszybz/assorted-cleanups

Assorted cleanups

Merge pull request #33791 from YHNdnzj/sd-notify-pidref

core: pin notify sender through pidfd (potentially SCM_PIDFD) plus various cleanups

Merge pull request #33814 from AnoukCeyssens/daemon

test: use new assertion macros more

fix compilation errors

test-clock: use new assertion macros

test-dev-setup: use new assertion macros

test-date: use new assertion macros

test-daemon: use new assertion macros

resolved: tests for link_allocate_scopes(): LLMNR, MDNS, IPv4/6

resolved: refactor env setup for link_allocate_scopes() tests

resolved: basic tests for link_allocate_scopes()

resolved: tests for link_find_address()

resolved: tests for link_relevant()

resolved: tests for link_new(), link_process_rtnl()

man/systemd-repart: extend description and reword some sentences

The page was written when systemd-repart was primarily intended to be used on a
running system. But nowadays it's more often used to create images, so extend
that part of the description.

While at it, fix some whitespace issues and trim some overly complicated sentences.

Merge pull request #33597 from keszybz/fetch-distro

Extend the distro fetching script to check the repository out

Document that MemorySwapMax supports % configuration

Certainly on systemd 252 at least a configuration of
```
MemorySwapMax=40%
```
is supported but this was missing from the man page.
Only MemoryMax was documented as supporting a %.

core: when switching root remove /run/systemd before executing the binary specified by init=

It's important if the binary specified by the init= boot option is not systemd
otherwise it confuses systemctl that incorrectly assumes that systemd is still
the init system due to the presence of /run/systemd/system.

Also some tools might also check the presence of /run/systemd/private to test
if systemd is running as pid1.

Make vcs-tag do something useful for non-developer mode as well

When building packages of arbitrary commits of systemd-stable,
distributors might want to include a git sha of the exact commit
they're on. Let's extend vcs-tag a little to make this possible.

If we're on a commit matching a tag, don't generate a git sha at all.
If we're not on a commit matching a tag, generate a vcs tag as usually.
However, if we're not in developer mode, don't append a '^' if the tree
is dirty to accomodate package builds applying various patches to the
tree which shouldn't be considered as "dirty" edits.

resolved: tests for dns_packet_dup()

shared/exec-util: add macro to autoinsert sentinel for fork_agent()

repart: use new style for pointers in function signatures

selinux-util: add missing char in comment

resolved: tests for dns_packet_patch_max_udp_size()

resolved: tests for dns_packet_append_answer(); LOC records

resolved: tests for dns_packet_append_answer(); TXT records

resolved: tests for dns_packet_append_answer(); NAPTR records