The captive portal is being replaced!  This hooks up the
new page into the services section while ditching most of
the old code.  There'll be no migration, if you use package
`opnsense-devel' and the captive portal you'll have to switch
to `opnsense' or migrate to the new code.  Beware that the
new captive portal is going to be a huge step forward but
features will trickle in week after week until it is stable
enough to merge it.  Latest release date is going to be 16.1.

not fully sure if we should place them in service section, they maybe moved to settings later on.

PR: https://forum.opnsense.org/index.php?topic=1490.0

This one and the former were good ideas, but:

o They only affected a very small percentage of the actual code, and
o Reviewing changes is best done in the config.xml, not the revision message.

For the first time ever we steal a system log tab and push it to
the respective service.  Invented by OPNsense.  :P