irc/ircd-hybrid: Updates to 8.2.34

Changes since 8.2.33:

• • Noteworthy changes in version 8.2.34 (2020-11-01)
• Re-implement backwards compatibility mode for old ircd-hybrid 8.2.23 and below. Final removal is scheduled for early 2021.
• For consistency, the general::network_desc configuration directive has been renamed to general::network_description
• Server notices that previously have been sent to user modes +f and +u are now sent to user mode +j (reject notices) instead. Due to this change, unauth and full have been removed from eneral::oper_only_umodes`, general::oper_umodes, and operator::umodes.
• User mode +b has been replaced with +f (flood). Spam/flood notices are now sent to this user mode. For this, bots has been removed from general::oper_only_umodes, general::oper_umodes, and operator::umodes. flood has been added instead to these configuration directives.
• Stricten server/user ID validation. IDs have to be all uppercase everywhere now.
• For a full list of all changes in this release, see https://git.io/JT7UH