Delete RCL_USE_XATTR configure/compile time variable, it was not

useful. Add configuration variable to use mtime instead of ctime for update
detection. Useful on a system where xattrs would be modified but not
indexed, to avoid excessive reindexing.

src/internfile/extrameta.cpp

@@ -17,8 +17,6 @@
 
 #include "autoconfig.h"
 
-#ifdef RCL_USE_XATTR
-
 #include <errno.h>
 
 #include "rclconfig.h"
@@ -145,5 +143,3 @@ void docFieldsFromMetaCmds(RclConfig *cfg, const map<string, string>& cfields,
 	}
     }
 }
-
-#endif // RCL_USE_XATTR