util.datamanager: Fix listing of host stores lfs returns the basename of the directory entry, and the check neglected to prefix the data path directory before calling lfs.attribute(), which resulted in checking Prosody's current working directory for the file instead.

module:log("error", "mod_pep_plus has been renamed to mod_pep, please update your config file. Auto-loading mod_pep...");
module:depends("pep");