r869 - ASCII Punctuation & Symbols For Char Names / Max Character Set To 12 / Character Select Packet Update

[Rytech 392]

=General
*Added a 2nd usable letters/symbols options for "char_name_letters".
-This option allows for the use of ASCII Punctuation & Symbols in character names.

*Removed MAX_CHARS_SLOTS.
-This was useless since noone uses the feature to set max slots and how many of
-those slots can be used. Best to only have MAX_CHARS.

*MAX_CHARS is now set to 12 by default.

*Update HC_ACCEPT_ENTER2 packet.

*HC_ACK_CHARINFO_PER_PAGE
*HC_CHARLIST_NOTIFY
*CH_CHARLIST_REQ
-Added support for these packets to better support the new character select.
-These are currently setup for 2018-06-20 and newer clients since I don't want
-to risk breaking things with older clients.