Implement Rlist2{Uid,Gid}List for Win32
Only compile nfs.c for Unix
Get rid of cfstat, do a proper libcompat stanza for stat(3)
Move uname(2) to libcompat-win32
putenv(3) is present on all supported platforms
Move alarm(3) to libcompat-win32
Move rename(3) to libcompat-win32, get rid of cf_rename