[12427] Implement spell 17009

Signed-off-by: Schmoozerd <schmoozerd@scriptdev2.com>
[12428] Add delayed starting for mmap extraction to ExtractResources script

[ci skip]

This should be helpfull for people falling asleep before starting the extraction :)
[12429] Fix possible memory corruption related to loading pet-spells

Fix cmangos/issues#158 (part for new creation of pets)
Thanks to tarwyn for pointing
[12430] Implement spells 50630, 70623 and 70638
[12431] Use proper error files for missing string errors
[12432] Do more checks if a Player can enter a map On Login

Also please feedback some experience what is supposed to happen in such cases.
[12433] Add support for the Rabbit Day

This adds a new config option "RabbitDay" - don't forget to set it to our
suggested value (see config file)!

Signed-off-by: DasBlub <DasBlub@gmail.com>