HTTP CONNECT proxy support.

 - The HTTP analyzer now supports handling HTTP CONNECT proxies
   same as the SOCKS analyzer handles proxying.
Allow iterating over bif functions with result type vector of any.

This changes the internal type that is used to signal that a vector
is unspecified from any to void.

I tried to verify that the behavior of Bro is still the same. After
a lot of playing around, I think everything still should worl as before.

However, it might be good for someone to take a look at this.

addresses BIT-1144
Fixing removal of support analyzers, plus some tweaking and cleanup of
CONNECT code.

Removal of support analyzers was broken. The code now actually doesn't
delete them immediately anymore but instead just flags them as
disabled. They'll be destroyed with the parent analyzer later.

Also includes a new leak tests exercising the CONNECT code.

Lines starting # with '#' will be ignored, and an empty message aborts
the commit. # On branch topic/robin/http-connect # Changes to be
committed: # modified: scripts/base/protocols/http/main.bro #
modified: scripts/base/protocols/ssl/consts.bro # modified:
src/analyzer/Analyzer.cc # modified: src/analyzer/Analyzer.h #
modified: src/analyzer/protocol/http/HTTP.cc # new file:
testing/btest/core/leaks/http-connect.bro # modified:
testing/btest/scripts/base/protocols/http/http-connect.bro # #
Untracked files: # .tags # changes.txt # conn.log # debug.log # diff #
mpls-in-vlan.patch # newfile.pcap # packet_filter.log # reporter.log #
src/PktSrc.cc.orig # weird.log #
Merge remote-tracking branch 'origin/master' into topic/robin/http-connect

Conflicts:
	scripts/base/protocols/ssl/consts.bro
Updating submodule(s).

 [nomail]
Expanding the HTTP methods used in the signature to detect HTTP traffic.
HTTP fix for output handlers.

Had broken that with the CONNECT change.
Merge remote-tracking branch 'origin/topic/bernhard/ticket-1144'

* origin/topic/bernhard/ticket-1144:
  Allow iterating over bif functions with result type vector of any.

BIT-1144 #merged
Merge branch 'topic/robin/http-connect'

* topic/robin/http-connect:
  HTTP fix for output handlers.
  Expanding the HTTP methods used in the signature to detect HTTP traffic.
  Updating submodule(s).
  Fixing removal of support analyzers, plus some tweaking and cleanup of CONNECT code.
  HTTP CONNECT proxy support.

BIT-1132 #merged