Added pop3_save_uidl setting. When UIDLs are sent to client, save them to dovecot-uidlist. This allows changing pop3_uidl_format without messages getting re-downloaded. It's also useful with virtual POP3 INBOX when UIDLs are based on IMAP UIDs that may not be as stable as in non-virtual INBOX.

#ifndef SYSINFO_GET_H
#define SYSINFO_GET_H

const char *sysinfo_get(const char *mail_location);

#endif