MySQL: Add Client can handle expried passwords extended Capability

Change-Id: I9464e7d188d8e8c027db94c214e692ff233a13fd
Reviewed-on: https://code.wireshark.org/review/3178
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
Tested-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
Reviewed-by: Daniël van Eeden <wireshark@myname.nl>
Reviewed-by: Evan Huus <eapache@gmail.com>