MrMC version 3.0.6, SMB bug squasher … part 2!!

Another bug fix release mainly targeting issues with SMB connections.

• core: revert host/ip lookup fallbacks
• core: add logging to CPasswordManager:AuthenticateURL
• core: fixed libsmbclient, off_t patch is incomplete, force off_t to 64 bits the old way
• fixed, crash on exit. do not delete renderer if not on gl context thread
• changed: CDNSNameCache::Lookup to use libdsm netbios lookup as fallback
  

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