MySQL SSL settings do not always require the sslkey option

Using the MySQL SSL settings in database.yml is conditional on there being an 'sslkey' option set. While this is sometimes the case, it's not always necessary. In many cases the only required option to set is the 'sslca' (certificate authority) file. This file is always required, even when the 'sslkey' option is also set.

Taken straight from the MySQL docs at: http://dev.mysql.com/doc/refman/...

If the account has no special SSL requirements or was created using a GRANT statement that includes the REQUIRE SSL option, a client can connect securely by using just the --ssl-ca option:

The patch just changes the conditional to check if 'sslca' is set instead of looking for 'sslkey'.

I have tested this on my local setup using only the sslca option. The connection worked fine and was being encrypted correctly (ie. I could see the SSL cipher when running the command 'SHOW STATUS LIKE 'Ssl_cipher';')

I apologize if the git patch is not correctly formatted. This is my first experience with git.