net-im/openfire: Update to 4.8.3

ChangeLog:
https://download.igniterealtime.org/openfire/docs/4.8.3/changelog.html

Improvement
 * [OF-2846] - Update zh\_CN translation

Bug
 * [OF-2843] - When admin attempts to ban owner, incorrect error condition is
   returned
 * [OF-2844] - Admins and owners must not be able to ban themselves
 * [OF-2845] - Failing close listener can severely delay closure of connection

PR:		280578
Reported by:	nikita@druba.su (maintainer)