Handle xz compressed files https://sourceforge.net/p/webadmin/bugs/4970/

syslog/save_log.cgi

@@ -96,7 +96,7 @@ elsif ($in{'view'}) {
 			}
 		$cat = "(".join(" ; ", @cats).")";
 		$got = &proc::safe_process_exec(
-			"$cat | grep -i $filter | $tailcmd",
+			"$cat | grep -i -a $filter | $tailcmd",
 			0, 0, STDOUT, undef, 1, 0, undef, 1);
 	} else {
 		# Not filtering .. so cat the most recent non-empty file

syslog/syslog-lib.pl

@@ -354,6 +354,9 @@ elsif ($l =~ /\.Z$/i) {
 elsif ($l =~ /\.bz2$/i) {
 	return &has_command("bunzip2") ? "bunzip2 -c $q" : undef;
 	}
+elsif ($l =~ /\.xz$/i) {
+	return &has_command("xz") ? "xz -d -c $q" : undef;
+	}
 else {
 	return "cat $q";
 	}