5.1 build 615
This build contains one new feature (IP whitelist) and bugfixes.
Special thanks to Elguerrero & MastoryMd5 for their contributions to this update

Change log
Commands

• Fixed permission check issue with /plan unregister that allowed anyone to unregister any user by if they knew their username.
• Fixed these commands from executing database queries on server thread:
  • /plan players
  • /plan network
  • /plan register
  • /plan manage raw
• Fixed /plan inspect throwing an NPE when a player tried to view someone elses profile without 'plan.inspect.other' permisison

Error Handling

• Crash due to OutOfMemoryException should now be resolved (The error handling should no longer consume so much memory)

Webserver
Added IP Whitelist
Config now contains Webserver.Security.IP_Whitelist and Webserver.Security.IP_Whitelist.Whitelist settings for whitelisting IP addresses that can access the webserver.

• The whitelist is disabled by default
• Default whitelist has IP addresses for local machine
• When enabled all requests from non-whitelisted IPs will be forbidden (403)
• Denied attempts are logged.
  

Database

• MySQL Launch Options setting now has &serverTimezone=UTC by default (not added to existing settings automatically)

Locale

• Spanish locale updated by Elguerrero
• Italian locale updated by MastoryMd5

Placeholders

• Fixed an NPE when a plugin gave PlaceholderAPI a null Player that was passed to Plan.