vmysql: expand remote_ip to store IPv6

[msimerson]

• expand vpopmail.lastauth.user to match length of vpopmail.pw_name

[msimerson]

Why are most of the columns using CHAR instead of VARCHAR? Strikes me as a port by someone not familiar with MySQL.

Would a PR that converts the CHAR column to VARCHAR be welcome? Run this query against your DB to see that VARCHAR is really a better choice:

SELECT LENGTH(pw_name), LENGTH(pw_domain), LENGTH(pw_passwd), LENGTH(pw_gecos), LENGTH(pw_shell), LENGTH(pw_clear_passwd) FROM vpopmail.vpopmail;

Would a PR that normalizes the SQL in vmysql.h so that it looks like a DBA wrote it be welcome?