Channel Admins are not allowed to set Channel Owner status!

Channel Admins are not allowed to set Channel Owner status!

This was reported back in April 2021, thanks Sarah!

    Subject: NGIRCD bug report
    Date: April 28 2021, 14:30:08 MESZ
    To: alex@barton.de

    Hello,

    I am writing to you to report a bug in ngircd.
    In any give channel, if an user is with mode +a (admin), he/she can
    sets mode +/-q(owner) to any other user. This is not inline with the
    documentation.

    I've looked into the code irc-mode.c, apparently an if block is
    missing. Below are the code snippets that I believe fixes the bug.

This patch is what Sarah sent in. Thanks a lot!