Added xbps_repository_pkg_replaces() to handle pkg "replaces" in the transaction.

The frontend (in that case xbps-bin(8)) is only responsible to remove
those packages that have the "trans-action" string object set to "remove".

include/xbps_api.h

@@ -53,7 +53,7 @@
  * @def XBPS_RELVER
  * Current library release date.
  */
-#define XBPS_RELVER		"20110130"
+#define XBPS_RELVER		"20110201"
 
 /** 
  * @def XBPS_META_PATH

include/xbps_api_impl.h

@@ -1,5 +1,5 @@
 /*-
- * Copyright (c) 2010 Juan Romero Pardines.
+ * Copyright (c) 2010-2011 Juan Romero Pardines.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -192,6 +192,13 @@ int HIDDEN xbps_file_exec_skipempty(const char *arg, ...);
  */
 int HIDDEN xbps_file_chdir_exec(const char *path, const char *arg, ...);
 
+/**
+ * @private
+ * From lib/package_replaces.c
+ */
+int HIDDEN xbps_repository_pkg_replaces(prop_dictionary_t,
+					prop_dictionary_t);
+
 __END_DECLS
 
 #endif /* !_XBPS_API_IMPL_H_ */