[Login] Added OP_ExpansionPacketData for RoF2 and update payload for Titanium (#2186)

* Fix for GENERIC_9_STRINGS

* Update .gitignore

* OP_ExpansionPacketData for Titanium and RoF2

* Update for login_opcodes_sod.conf

* Add OP_LoginExpansionPacketData for Titanium and RoF2

* Few expansion fixes

* Update client.h

* Update client.h

* l

* Updates based on PR feedback.
Moved configuration to login.json
Set Titanium limits to constants

* Update login.json

Added the two configurations to login.json
display_expansions - true/false to display on the server select screen
max_expansions - the bitmask of expansions enabled (http://spire.akkadius.com/calculators#expansions-bitmask-calculator)

* Further cleanup based on feedback.

* Further cleanup and refactor max_expansions to max_expansions_mask to better reflect its purpose

* Missed rename of max_expansions corrected.

common/emu_oplist.h

@@ -303,6 +303,7 @@ N(OP_LockoutTimerInfo),
 N(OP_Login),
 N(OP_LoginAccepted),
 N(OP_LoginComplete),
+N(OP_LoginExpansionPacketData), //added for Rof2 client to send expansion data packet.  Requires login_opcodes_sod.conf to be updated.
 N(OP_LoginUnknown1),
 N(OP_LoginUnknown2),
 N(OP_Logout),