[0008] cmangos-classic update z2054

Add Outdoor PvP placeholders and string texts by stfx

https://github.com/cmangos/mangos-classic/commit/c6f428f435408dad177c730711862a0c02c27bd6
[0009] cmangos-classic update z2067

Fix the language ids and drop some obsolete params by stfx and xfurry

https://github.com/cmangos/mangos-classic/commit/3c4063b2a6891d6ef3f22ae30f52984b042e1561
[0010] cmangos-classic update z2069

Drop the Skill Discovery and Skill Extra Items - not related to classic
by TheLuda

https://github.com/cmangos/mangos-classic/commit/bc8a0fa1f6f62e2f87b9bc6baa9b3c19fa372687
[0011] cmangos-classic update z2102

Improve AreaTrigger teleport requirement checks by cyberium and rsa

Also drop basicly unneeded `areatrigger_teleport`.required_failed_text
field.
This concept is still in testing phase, please feedback results of some
glitches that might exist!

TODO: Use Player::GetAreaLockStatus or GetAreaTriggerLockStatus for
other "CanEnter" checks as well.

https://github.com/cmangos/mangos-classic/commit/a3f016e6e6d683d96c367132cc0c23798f4ff1a2
[0012] cmangos-classic update z2124

Add new table `creature_template_spells` to store a creature's spells by
cyberium

This will replace old creature_template.spell1-4 fields. Note: Removing
them from the database will come soon

https://github.com/cmangos/mangos-classic/commit/023c617ed99ca455c80b67fa1cb4b28757025606
[0013] cmangos-classic update z2153

Use new liquid extraction by Shauren, cyberium and Zergtmn

https://github.com/cmangos/mangos-classic/commit/12082d11657b0b0a80d15c1a3c84d83877153b62