Change log 5.1 build 497

More bugfixes to reported issues

Bugfixes

• Fixed Html customized resources being overwritten & not being used
• Fixed ERR_INVALID_REDIRECT when server.properties has empty IP
• Possibly Fixed ERR_TOO_MANY_REDIRECTS with default server name
• Fixed Some error pages not having css
• Fixed /server/Server <bungee id> not redirecting to /network
• Fixed ${serverName} appearing on some plugins tabs
• Fixed ConcurrentModificationExceptions related to ResourceSettings
• Fixed BuyCraft API 403 causing a bunch of errors to spew.
• Fixed unfinished RedisBungee setup causing an NPE