New configuration scheme changes, round 2 (virtual pkgs).

- XBPS now expects to read individual virtual pkg settings from
  .plist files in PREFIX/etc/xbps/virtualpkg.d.wants.

This really implements the missing part in issue #12 in
googlecode: http://code.google.com/p/xbps/issues/detail?id=12

lib/Makefile

@@ -45,7 +45,7 @@ OBJS += transaction_dictionary.o transaction_sortdeps.o
 OBJS += download.o fexec.o humanize_number.o plist.o
 OBJS += plist_archive_entry.o plist_find.o plist_match.o plist_remove.o
 OBJS += plist_fetch.o util.o util_hash.o mkpath.o initend.o
-OBJS += regpkgdb_dictionary.o match.o dewey.o
+OBJS += regpkgdb_dictionary.o match.o dewey.o init_virtualpkgs.o
 OBJS += repository_findpkg.o repository_finddeps.o
 OBJS += repository_pool.o repository_pool_find.o repository_sync_index.o
 OBJS += $(COMPAT_SRCS)