Update manpage

- Replace freenode with libera
- Change copyright info

Author: Flole998

man/tvheadend.1

@@ -202,9 +202,9 @@ If daemonizing, Tvheadend will writes its pid in /run/tvheadend.pid
 and this man page is maintained by the Tvheadend team. Please see the 
 application for credits.
 .PP
-You may also visit #hts at irc.freenode.net
+You may also visit #hts at libera.chat
 .SH "COPYRIGHT"
-2006 - 2016 Andreas Öman, et al. 
+2006 - 2024 Andreas Smas, et al. 
 .PP
 Licensed under GPLv3 <https://www.gnu.org/licenses/gpl-3.0.txt>.
 This is free software: you are free to change and redistribute it subject