Merge pull request #1923 from zonque/siphash

siphash24: let siphash24_finalize() and siphash24() return the result…

diff --cc src/basic/siphash24.c
Simple merge

diff --cc src/journal/journald-rate-limit.c
Simple merge

diff --cc src/libsystemd-network/dhcp-identifier.c
Simple merge

diff --cc src/libsystemd-network/network-internal.c
Simple merge

diff --cc src/libsystemd/sd-bus/bus-bloom.c
Simple merge

diff --cc src/nspawn/nspawn-network.c
Simple merge

diff --cc src/test/test-siphash24.c
Simple merge