posix: add getnameinfo(3) and assorted constants
posix: add getnameinfo(3) and assorted constants

xdave/pvala,Distrotech/vala,frida/vala,flobrosch/vala-fixes,GNOME/vala,Distrotech/vala,frida/vala,rvu95/vala,severinh/vala,Distrotech/vala,frida/vala,GNOME/vala,jessevdk/vala,tjol/vala-tjol,severinh/vala,rvu95/vala,flobrosch/vala-fixes,playya/vala,spidermonkdust/vala,spidermonkdust/vala,GNOME/vala,jessevdk/vala,tjol/vala-tjol,tjol/vala-tjol,playya/vala,flobrosch/vala-fixes,spidermonkdust/vala,rvu95/vala,GNOME/vala,playya/vala,frida/vala,jessevdk/vala,severinh/vala,frida/vala