meson: set sendmmsg to autodetection

25 jobs for enable-sendmmsg in 42 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Build
canceled #314226
amd64 linux docker
archive

00:00:42

canceled #314227
amd64 linux docker
build

00:00:42

canceled #314228
amd64 linux docker
build-asan

00:00:42

canceled #314229
docker
kres-gen

00:00:42

 
  Test
canceled #314230
docker delayed
build:darwin

canceled #314231
amd64 linux docker
deckard

canceled #314232
docker delayed
doc

canceled #314233
dind
docker

canceled #314234
docker delayed
lint:other

canceled #314235
amd64 linux docker delayed
lint:pedantic

canceled #314236
amd64 linux docker
lint:scan-build

canceled #314237
amd64 linux docker
lint:tidy

canceled #314238
amd64 linux docker
respdiff:basic

canceled #314239
amd64 linux docker delayed
test:valgrind

 
  Extended
canceled #314241
respdiff
fwd-tls6-kresd.udp6

canceled #314242
respdiff
fwd-udp6-kresd.udp6

canceled #314246
respdiff
fwd-udp6-unbound.tcp6

canceled #314247
respdiff
fwd-udp6-unbound.tls6

canceled #314245
respdiff
fwd-udp6-unbound.udp6

canceled #314244
respdiff
iter.tls6

canceled #314243
respdiff
iter.udp6

canceled #314240
amd64 linux docker
pytests

canceled #314248
respdiff
resperf:fwd-tls6.udp-asan

canceled #314249
respdiff
resperf:fwd-udp6.udp-asan

canceled #314250
respdiff
resperf:iter.udp-asan