pfSense

Fix issue with CSR generation. Ticket #2820

Fixes #3460. Ask for validation when real operation will be done and ask for the operation with POST to get protection from CRSF.

Remove code that is commented

Fixes #3461. Remove any special char that can lead to shell/XSS compromises from submitted input.

Merge pull request #890 from N0YB/Gateway_Monitor

Gateway Monitor Advanced Settings

Do not call rc.newwanip when pppoe gets a v6 ip.

Move this global declaration to the proper file rather than backend code

Help ticket #3449:

Improve data validation to avoid save a host/subnet or a IPv4 with
invalid mask. The reported error is on javascript and only happen on
IE8,but this fix will prevent the same issue happening in the future on
a different browser.

Use correct parameter (bootfile-url) to configure netboot on DHCPdv6, it fixes #3421

Use htmlspecialchars(), a better solution for #2952