Implemented blueprint 'install-pkg-by-pkgmatch' as specified in

https://blueprints.launchpad.net/xbps/+spec/install-pkg-by-pkgmatch

The implementation works as expected, it was easier that I thought.
Bump XBPS_RELVER because the API was changed slightly.

--HG--
extra : convert_revision : xtraeme%40gmail.com-20100114011431-xv5q6bgahm6v9dbq

bin/xbps-bin/main.c

@@ -46,7 +46,7 @@ usage(void)
 	"    autoremove\n"
 	"    autoupdate\n"
 	"    check\t\t[<pkgname>|<all>]\n"
-	"    install\t\t<pkgname(s)>\n"
+	"    install\t\t[<pkgname(s)>|<pkgpattern(s)>]\n"
 	"    list\n"
 	"    list-manual\n"
 	"    purge\t\t[<pkgname>|<all>]\n"