glog: have createInDir fail if the file already exists

glog: fix typo (#73)

glog: check that stderr is valid before using it by default (#72)

glog: avoid calling user.Current() on windows (#69)

glog: don't hold mutex when sync'ing (#68)

glog: add context variants to most log functions

glog: populate symlinks -log_link directory (#64)

glog: use os.Stderr directly for writing to stderr (#62)

glog: update minimum go version to go1.19 (#61)

glog: don't use SIGABRT on platforms that don't support signals