[core] Set m_TimeType at server startup, call TOTD change on startup

[WinterSolstice8]

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What does this pull request do?

m_TimeType is not set on startup which could cause issues with mob scripts that check TOTD.
Call TOTD change on startup so mobs that should spawn at certain times do (such as undead)
Note: time_server is normally what calls that, but it's delayed by 2.4 seconds so as far as I know this wouldn't result in TOTD change being called twice with the same time type.

Steps to test these changes

start server @ night
!zone konschtat highlands
!gotoname Wolf_Zombie 1

See zombie there