When sqlickrypt is run with the option "register", it expects a
username, password, and email, and adds them to the database if the
username is not already in use.
The quickrypt utility is replaced with sqlickrypt, which takes a username
and password pair and checks them against the SQLite password database
used by dgamelaunch. This will be more extensible to using rlgwebd to
register, change passwords, etc.
