Foreman » Smart Proxy

Fixes #7849 - re-factor trusted_hosts handling

On HTTPS we will get the FQDN from the client certificate and check against the
list.

While on HTTP we will perform both reverse DNS and forward DNS lookup to verify
the client may talk to us.

Additionally the forward_verify of DNS can be disabled.

Fixes #8948: Remove implicit test ordering from DHCP API test

I had an conflict with test-unit on my system.

test-unit uses alphabetic by default, only minitest supports
"sorted", which is default there.

refs #8948 - Problem with implicit test ordering from DHCP API test

fixes #8811 - refactor per-module enabling of http(s) to http(s)_rackup

Fixes #8748 - Allow per-module enabling of http(s)

Fixes #8210 - Adding caching for smart-proxy puppet classes using Stefan Julin's implementation of cache

Fixes #8538 - Fixed ISC DHCP states and duplicities

Our ISC DHCP parser was not respecting binding states "free" vs "active" and
it was reading free (released) leases as active. Also, with longer lease
times it was loading multiple leases as duplicities. Both was causing...

Refs #8267 - pass template_url in call to foreman

Also passes the ?static parameter on correctly

fixes #8300 - set webmock custom HTTP status response correctly

Fixes #8160 - Remove chef related code

Code was extracted to separate chef plugin. See
https://github.com/theforeman/smart_proxy_chef

Refs #969 - Proxy-side changes for serving templates from the proxy

An update to @GregSutcliffe's original PR. Ports his original feature to the new
plugin api.