Merge pull request #1 from stevesbrain/master

Couple extra recipient restrictions
added in note, attention, and hint blocks and fixed syntax highlighting
make filenames less ambiguious.  Thanks gnarlywalrus
fixed a SQL query fail on my part. I left a hanging comma
fixing an error in the text
fixing a grammar error on the About page
fixed an issue in 10-ssl.conf for Dovecot and fixed an issue in OpenDKIM instructions
Updated to reflect changes
Merge remote-tracking branch 'upstream/master'