Merge pull request #1517 from pi-hole/fix/teleporter_hostnames

Fix teleporter bug on hosts with . in their names

scripts/pi-hole/php/teleporter.php

@@ -540,7 +540,7 @@ function process_file($contents)
 }
 else
 {
-	$hostname = gethostname() ? gethostname()."-" : "";
+	$hostname = gethostname() ? str_replace(".", "_", gethostname())."-" : "";
 	$tarname = "pi-hole-".$hostname."teleporter_".date("Y-m-d_H-i-s").".tar";
 	$filename = $tarname.".gz";
 	$archive_file_name = sys_get_temp_dir() ."/". $tarname;