use a new helper method to verify HTTP response codes are 200 OK
Make script execute properly in the context of 'set -e'
remove debug comments
Merge pull request #764 from pagespeed/jmarantz-systest-exit-on-error

Make script execute properly in the context of 'set -e'
Merge pull request #763 from pagespeed/jmarantz-http-200-ok-function

use a new helper method to verify HTTP response codes are 200 OK
script-variables: Support LoadFromFileXXX

Based on 75a4481 from master.

Add support for script variables in LoadFromFileXXX configuration to trunk-tracking,
which can be enabled by adding "pagespeed ProcessScriptVariables on" in
the http{} block.
Also adds a helpful comment to ps_dollar().

Fixes https://github.com/pagespeed/ngx_pagespeed/issues/549
Docs: https://github.com/pagespeed/ngx_pagespeed/wiki/Script-variables-in-LoadFromFile-configuration

Resolved conflicts:
	src/ngx_rewrite_driver_factory.h
	src/ngx_rewrite_options.cc
	test/nginx_system_test.sh
Merge pull request #765 from pagespeed/oschaaf-trunk-tracking-script-support

script-variables: Support LoadFromFileXXX
rewriting-posts: Support POST responses for html

Allow rewriting html responses to POST requests

Fixes https://github.com/pagespeed/ngx_pagespeed/issues/757
Merge pull request #767 from pagespeed/oschaaf-issue-757

rewriting-posts: Support POST responses for html
Port over test adjustment.
Merge pull request #772 from pagespeed/morlovich-fix-metadata-form-test

Port over test adjustment.

This is just a straight port of relevant portion of https://code.google.com/p/modpagespeed/source/detail?r=4140
beacon response body processing from temp file

Add support for processing beacon posts with data sizes that exceed
the default or configured client_body_buffer_size, plus a system test
to ensure it.

Fixes https://github.com/pagespeed/ngx_pagespeed/issues/752
Merge pull request #769 from pagespeed/oschaaf-large-beacon-posts

beacon response body processing from temp file
testing: direct port of r4146 to fix message color issue
Merge pull request #773 from pagespeed/jefftk-nginx-message-color

testing: direct port of r4146 to fix message color issue
Add some comments and a few style fixes.