void imap_qualify_path (char* dest, size_t len, const char* host, int port,
void imap_qualify_path (char *dest, size_t len, const IMAP_MBOX *mx,
void imap_qualify_path (char* dest, size_t len, const char* host, int port,  const char* path, const char* name){  if (port == IMAP_PORT)    snprintf (dest, len, "{%s}%s%s", host, NONULL (path), NONULL (name));  else    snprintf (dest, len, "{%s:%d}%s%s", host, port, NONULL (path),      NONULL (name));}