Simplify all code that used rootdir and flags passed via xbps-bin.

Add util funcs to get/set global values for them:
 * xbps_[gs]et_rootdir()
 * xbps_[gs]et_flags()

--HG--
extra : convert_revision : 2584b098e68a684e7b0eeac57c2b1df4aba6589d

lib/util.c

@@ -35,6 +35,7 @@
 #include <xbps_api.h>
 
 static const char *rootdir;
+static int flags;
 
 int
 xbps_check_file_hash(const char *path, const char *sha256)
@@ -238,6 +239,24 @@ xbps_set_rootdir(const char *dir)
 	rootdir = dir;
 }
 
+const char *
+xbps_get_rootdir(void)
+{
+	return rootdir;
+}
+
+void
+xbps_set_flags(int lflags)
+{
+	flags = lflags;
+}
+
+int
+xbps_get_flags(void)
+{
+	return flags;
+}
+
 char *
 xbps_append_full_path(bool use_rootdir, const char *basedir, const char *plist)
 {