irc/ircd-hybrid: Updates to 8.2.28

Changes since 8.2.27:

• Noteworthy changes in version 8.2.28 (2020-01-26)

o) Fixed issue with topics set by TBURST not being propagated properly to clients
o) Allow IRC operators to search for real hosts in "WHO"
o) Ban/exempt/invex masks are now also tested against realhosts to prevent clients

from bypassing channel bans by activating a fakehost

o) For a full list of all changes in this release, see https://git.io/JvqpT