Add SALVAGE to MISC_SKILLS List
Fix Maximum Quantity in Salvage configs
Cleanup RepairConfig leftovers in SalvageConfig

Some copy/pasta I forgot to remove
Let config key take priority here
Check permission before sending anvil messages
Actually fix maximumQuantity reading from config

Now we try to automatically detect the maximum quantity if possible and
fall back to the config if the user has set a value there.

Also fixed the feedback message which said „Minimum quantity” instead
of „Maximum quantity”
Added missing Salvage permissions to plugin.yml
Remove this check here, allows Salvage in Adv mode

We’re already checking if the players game mode isn’t CREATIVE, so we
can safely remove this check.

Fixes #2059
Save users asynchronously
Remove PvpLogger checks

No longer needed when testing with Combat Tag v6.1.4, the NPCs have
metadata „NPC”.

Fixes #2017
Fix an IndexOutOfBoundsException: Index: 0

In SaveTimerTask.java

Fixes #2039
Update changelog