[Commands] Add additional #peqzone functionality. (#2085)

* [Commands] Add additional #peqzone functionality.
- Add #peqzone flagging capabilities so operators don't have to blanket allow #peqzone access to zones.
- Allows you to set a zone's `peqzone` column to `2` and disallow use of `#peqzone` until they have been given the appropriate flag.
- Add #peqzone_flags command to list your #peqzone flags similar to #flags command.
- Add `character_peqzone_flags` table to database and database_schema.h.
- Required SQL update to add the new table.
- Add client:ClearPEQZoneFlag(zone_id) to Lua.
- Add client:HasPEQZoneFlag(zone_id) to Lua.
- Add client:LoadPEQZoneFlags() to Lua.
- Add client:LoadZoneFlags() to Lua.
- Add client:SendPEQZoneFlagInfo(client) to Lua.
- Add client:SetPEQZoneFlag(zone_id) to Lua.
- Add $client->ClearPEQZoneFlag(zone_id) to Perl.
- Add $client->HasPEQZoneFlag(zone_id) to Perl.
- Add $client->LoadPEQZoneFlags() to Perl.
- Add $client->SendPEQZoneFlagInfo(client) to Perl.
- Add $client->SetPEQZoneFlag(zone_id) to Perl.

* Fixes.

common/database_schema.h

@@ -62,6 +62,7 @@ namespace DatabaseSchema {
 			{"character_pet_buffs",            "char_id"},
 			{"character_pet_info",             "char_id"},
 			{"character_pet_inventory",        "char_id"},
+			{"character_peqzone_flags",        "id"},
 			{"character_potionbelt",           "id"},
 			{"character_skills",               "id"},
 			{"character_spells",               "id"},
@@ -129,6 +130,7 @@ namespace DatabaseSchema {
 			"character_pet_buffs",
 			"character_pet_info",
 			"character_pet_inventory",
+			"character_peqzone_flags",
 			"character_potionbelt",
 			"character_skills",
 			"character_spells",