Tidy up "system_usermanager.php" XHTML

Add CLOSEHEAD varialbe and manually close HEAD
Add CDATA sections to SCRIPTS
Deprecate Ampersand in Anchor tags
Remove NAME from TR tag, not valid in XHTML
Remove WRAP from TEXTAREA and Javascript to take wrap off
Tidy up misc. XHTML

Close FORM tag correctly
Add missing TD and TR tags
Move NOWRAP into CLASS statement
Tidy up Ampersand XHTML

Deprecate Ampersand in Anchor tags
Tidy up "system_firware" XHTML

Remove WRAP from TEXTAREA and add Javascript to add wrap hard
Add ICMP to filter parser, it should fix #3663
Trim whitespaces from options text and fix #3674
Split the setting of logging pass and block into 2 separate settings. Maybe this can be extended to control even the user rules?
Make logging of pass rules opt-in rather than opt-out
Remove the space here which probably is preventing from calling sshd from fcgi
Make sure check_reload_status is stopped so it can be upgraded and no events disturb the upgrade.
Use script-friendly gmirror status output to build this info, old method was breaking output when the mirror was being rebuilt.
Update rrd.inc

fixed NTPd graphs resetting when service restarts or reconfigured (thanks charliem https://forum.pfsense.org/index.php?topic=76620.msg422811#msg422811)
Update services_ntpd_gps.php

Fixed MRC->RMC typos in sentence types, display and fine-tuning for SureGPS card.
Merge pull request #1209 from ExolonDX/branch_master_01
Merge pull request #1210 from ExolonDX/branch_master_02
Merge pull request #1211 from ExolonDX/branch_master_03
Merge pull request #1212 from ExolonDX/branch_master_04
Merge pull request #1216 from nagyrobi/patch-14
Merge pull request #1217 from nagyrobi/patch-15
Show disabled interface when it was already part of interface group, it avoids to show a random interface instead and let user to add it by mistake. It should fix #3680