vlog: Add user command to inject log message. #6798

Job	Run time
linux rpm fedora	3m 59s
libreswan (ubuntu-24.04)	8s
dpdk gcc (ubuntu-24.04)	6s
linux deb no dpdk	4m 33s
build oss-fuzz fuzzers	2m 55s
osx clang --disable-ssl	1m 46s
clang-analyze-cache	11m 24s
linux gcc --disable-ssl	2m 25s
linux clang --disable-ssl	2m 33s
linux gcc c99	3m 25s
linux clang c99	2m 50s
linux gcc test	8m 33s
linux clang address,undefined test	16m 57s
linux gcc test --enable-shared	11m 24s
linux clang test --enable-shared	11m 18s
linux gcc check check-dpdk dpdk	20m 9s
linux clang check check-dpdk dpdk	20m 12s
linux gcc test -ljemalloc	9m 7s
linux clang test -ljemalloc	8m 55s
linux gcc --enable-afxdp	2m 33s
linux clang --enable-afxdp	2m 32s
linux gcc dpdk --enable-shared	3m 38s
linux clang dpdk --enable-shared	3m 54s
linux gcc dpdk-shared	3m 8s
linux clang dpdk-shared	3m 10s
linux gcc dpdk-shared --enable-shared	3m 46s
linux clang dpdk-shared --enable-shared	3m 51s
linux gcc m32 --disable-ssl	2m 38s
linux gcc check-ovsdb-cluster	6m 59s
linux gcc check-kernel -100	10m 30s
linux gcc check-kernel 100-	17m 15s
linux clang address,undefined check-kernel -100	12m 52s
linux clang address,undefined check-kernel 100-	20m 23s
linux gcc check-offloads -100	9m 49s
linux gcc check-offloads 100-	11m 51s
linux gcc dpdk check-system-userspace	13m 5s
linux clang address,undefined dpdk check-system-userspace	17m 9s
linux gcc dpdk check-system-tso	12m 47s
linux gcc dpdk check-afxdp	12m 25s
clang-analyze	10m 54s
	5h 27m 48s

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