Allow operation with less privileged user

[dopey]

Fixes #42

[dopey]

@clayrosenthal I got it working by switching out the backticks for single quotes. Based on the documentation, I think that's ok. I also did some unit fuzz testing and that seems to work as expected.

Do you have a setup where you're able to test a few instances of this binary against a mysql server? Maybe with different permissions as you were hoping to use it.

[clayrosenthal]

I have a setup that I can use to test this with, but unsure how to build this binary given its separate from the main certificates repo