Merge branch 'sk/msvc-warnings' into next #1854

Job	Run time
config	10s
fuzz smoke test	33s
win+VS build	0s
win build	5m 8s
linux32 (i386/ubuntu:focal)	9m 15s
linux-musl (alpine)	7m 55s
pedantic (fedora)	1m 50s
sparse	5m 30s
static-analysis	3m 53s
linux-asan-ubsan (ubuntu-latest)	32m 45s
documentation	3m 22s
linux-gcc (ubuntu-20.04)	10m 8s
linux-leaks (ubuntu-latest)	27m 24s
linux-gcc-default (ubuntu-latest)	10m 1s
win+VS test	0s
linux-reftable (ubuntu-latest)	10m 33s
linux-reftable-leaks (ubuntu-latest)	29m 15s
linux-sha256 (ubuntu-latest)	10m 37s
osx-clang (macos-13)	46s
linux-TEST-vars (ubuntu-20.04)	10m 15s
osx-gcc (macos-13)	1m 1s
osx-reftable (macos-13)	50s
win test	0s
	3h 1m 11s

Provide feedback