Added help entry for users looking to update their hostfile

 - In regards to issue #365
Updated nginx and apache sections to include link to help section

 - Added id to help section header to allow linking
 - Updated apache vhost section to include link to appropriate help section
 - Added informational text to nginx vhost section matching apache vhost section
 - Addresses issue #365
Merge pull request #394 from taion809/issue_365

Issue 365