chore: import upstream snapshot with attribution

pap/save_sync.cgi

@@ -0,0 +1,20 @@
+#!/usr/local/bin/perl
+# save_sync.cgi
+# Save unix-ppp synchronisation options
+
+require './pap-lib.pl';
+$access{'secrets'} || &error($text{'secrets_ecannot'});
+$access{'sync'} || &error($text{'sync_ecannot'});
+&ReadParse();
+
+&lock_file("$module_config_directory/config");
+foreach $s ("add", "change", "delete") {
+	if ($in{$s}) { $config{"sync_$s"} = 1; }
+	else { delete($config{"sync_$s"}); }
+	}
+$config{'sync_server'} = $in{'server'};
+&write_file("$module_config_directory/config", \%config);
+&unlock_file("$module_config_directory/config");
+&webmin_log("sync", undef, undef, \%in);
+&redirect("");
+