Make sure errno is preserved in non-delayed signal handlers. The current code didn't have any signal handlers that modified errno, so this doesn't fix any bugs.
Make sure errno is preserved in non-delayed signal handlers.
The current code didn't have any signal handlers that modified errno, so
this doesn't fix any bugs.

jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot