Streamer breaks if username has . in it

[neon-ninja]

https://github.com/DICE-UNC/irods-php/blob/master/prods/src/ProdsFile.class.php#L67 breaks the user segment apart based on the . character, assuming the format username.zone.authtype (authtype is optional). However, my username is of the format firstname.lastname, causing the zone to be set to my last name, which is not a valid zone, which means the stream cannot be opened.