Mangos 10835 - 10866
Code:
Add/correct a couple more spell_proc_event entries for trinket related spells

*Affected items: 45131, 45219, 50359, 50366, 50360, 50365,
          50353, 50348, 50362, 50363, 50342, 50343, 50358
Again ignore EffectSpellClassMask when SchoolMask given in spell_proc_event.

There's just too much garbage in dbc...
Should restore some damage school based talents broken with [10830],
hopefully without excessively triggering other spells again that shouldn't.
Implement script effect of spell 26218.

Also do small spells ordering around.
Not report error for missing reqs for some quest timed achievements.

This achievements in fact not required any additional checks.
At far teleport fail retunr player to source point instead homebind.
Implement server side part of SPELL_AURA_ADD_MECHANIC_ABILITIES (293) work.

Also fix stealth/invisibility visual affect flags changed at some 3.x switch.
Implement charges counting for magnet target auras.

Also implement skip spell effects redirecting if magnet target can't be
targeted by this spell effect base at spell effect target data requirements.
Allow fill DB table spell_script_target for TARGET_AREAEFFECT_INSTANT(7)

Without any database entries for spell, spell will work like before.
Valid targets filled to database can only be creature type (corpse or alive).
Fix AuraType 138 to not affect ranged haste, and rename to SPELL_AURA_MOD_MELEE_HASTE.

Also type 192 had misleading name, rename to SPELL_AURA_MOD_MELEE_RANGED_HASTE.
Remove small redundency in magnet spell charges checks.
Add dummy effect of spell 49634 and dummy aura of spell 56511

note* spell will need data in spell_script_target to work properly.
note* the effect of 56511 does not work, see comment in code for details (code added in any case, to not forget the problem)
Add dummy aura of spell 43874 (indirectly related to spell/effect 50133)
Unsummon guardians at second item use for items without cooldown.
New system for parallelizing client packet processing. Handle WorldSession updates in Map::Update() where we are safe to proceed. Thank you for all your feedback!
Fix build with gcc.
Move common check part for recently added filter classes to helper function.

This is more safe have expected tio be same check in one function.

Also apply some code style fixes.
Small function order in sources update.
Fixed typo in [10847]
 Report about GM invisible state at login if enable.
Fixed crash at .character erase command use.
Add TARGET_AREAEFFECT_GO_AROUND_DEST(52) (renamed from TARGET_AREAEFFECT_CUSTOM_2)

Target selects all gameobject around destination, limited by adding spell with a corresponding gameobject entry in database table spell_script_target.
Correct two whitespace errors
Complete set Byte/ShortFlag value functions and use it for PLAYER_FIELD_BYTES proper access.

Not expected any changes in work.
Add triggered spell part for dummy effect of spell 43572
Search for linked GO using the original used GO as base of the search

Add some comments for future improvements of this function.
Handle GAMEOBJECT_TYPE_TRAP in Use, as done for other GO types.

This just move parts of existing code from TriggeringLinkedGameObject and does not affect summoned trap type GO's (or related to summoned).
Large flightless birds (emu) think they are invisible, even when they are not.

Only if _not_ isGMVisible, invisible notification can be sent :)
Fixed not show and lost mail items in returned expire mails.

Also
* Use typename for mail item info vector.
* Include tools/characters_mail_items_cleanup.sql for cleanup lost mail items.
  It also included as sql update part. Sql update also fix receiver for stored
  in DB expired mail items.
Fixed triggering/use effects for item 54589, 54573, 37734, 32500, 28590.
Implement itemsets 881, 882 at heal/damage target effect.
Make DB code thread-safe. Original patch by Machiavelli and Kero99.
Unsummon guardians at re-cast only for non-triggered case.
YTDB 356
Code:
+ all fixes from forum
+ fix spawn
+ quest scripts
+ mob's gossip menus
+ new templates from WDB