libathemecore: Deduplicate VERSION string building code
protocol/inspircd: Send a VERSION string that is similiar to what we send to other ircds
protocol/inspircd: Allow all METADATA accountname messages to set the internal account name of a user

Fixes #308
nickserv/multimark: Fix const discard warnings
transport/jsonrpc: Fix format argument type mismatch warning
Merge pull request #384 from attilamolnar/master+inspircd-login-fix

protocol/inspircd: Allow all METADATA accountname messages to set the internal account name of a user
Merge pull request #385 from attilamolnar/master+multimark-warnfix

nickserv/multimark: Fix const discard warnings
Merge pull request #386 from attilamolnar/master+jsonrpc-warnfix

transport/jsonrpc: Fix format argument type mismatch warning
Merge pull request #383 from attilamolnar/master+version

Send the correct version string to InspIRCd servers
helpserv/ticket: optionally accept a close reason and send a memo to an offline user (closes #129)
gameserv/dice: make maximum rolls configurable (closes #278)
protocol/inspircd: chase rejoindelay announcement changes (inspircd #913) (closes #380)
atheme 7.2.0-beta1.