Adds an upgrade script to change all existing entries to the respective gender in their account.
Cleanup of a few strange design decisions in the character server code.
Removed SEX_ACCOUNT.
Thanks to @Daegaladh for his help.
Fixes#3017
Thanks to Hercules for the idea and their implementation of it.
This deprecates Windows XP support. If you want to use it to run your server on it, you have to forcefully enable it now.
Since 64bit ticks do not exist on XP, you might encounter some issues that are already fixed on other OS.
Follow up to a942853.
Fixes#3336.
Moved map_data storage to std::map container.
Created map_getmapdata to obtain pointer to map_data.
Got rid of MAX_MAP_PER_SERVER define.
Resolved deletion of instances causing other instances to lose their intended map ID.
Refactored warp suggestions
Thanks to @teededung, @anacondaqq, @cydh and @Lemongrass3110!
* Alphabetically sorted includes.
* Updated copyright and license text to match across all files.
* Removed pragma once define in header files in lieu of ifdef guards.
