rpcd: update to Git HEAD (2026-06-04)

rpcd: update to Git HEAD (2026-06-04)

69b62b1990bc rpc-sys: packagelist: increase input buffer size
e655a0d69492 exec: defer async reply teardown to avoid use-after-free
5b078674a592 optimize by reusing timeout member
d005c885dbe4 session: clamp uloop timeout to avoid int overflow
a545f008da91 ucode: add request.defer() for async method handling
ab6549a99c7c file: avoid sending uninitialized stack memory for broken symlinks
7af2dd81cd53 main: prevent integer overflow when parsing -t timeout argument
680705e4b76d plugin: use snprintf in ubus lookup callback to prevent buffer overflow
fb0302dc0e51 session: detect short read of /dev/urandom in rpc_random()
dc091afa5860 rpc-sys: packagelist: check calloc() result for world array
4fbd48515d6a rpc-sys: packagelist: avoid size_t underflow when stripping ABI version
46fce7d5efc9 ucode: fix off-by-one truncation of generated ubus object type name
26dba5206e17 exec: prevent double close() of exec pipe descriptors
af5d6f431186 uci: prevent integer overflow of client supplied apply timeout
d06d2a81dc29 rc: fix memory leak of list request context
0de666811559 rc: copy list "name" filter to avoid use-after-free
75470f4b5124 rc: use a per-request blob_buf for the list reply
3037a0e36856 treat exec failures in forked children with _exit() instead of return
f5ffec54d7c7 rc: reap killed child on list "running" check timeout
fd4fcdeb186b rpc-sys: packagelist: close status file on world parsing error paths
e22aea1a51df rpc-sys: packagelist: read world file instead of mmap to avoid SIGBUS
79c8087c8e8e file: avoid zero-length b64_decode() on empty write data
cd1d9588da63 ucode: bound recursion when converting blob arguments to ucode values
2decaec3ef1b iwinfo: fix error handling and backend leak in survey
28faf6403792 cast char arguments to unsigned char for ctype.h functions

Link: https://github.com/openwrt/openwrt/pull/23650
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>