Check privoxy runtime logs

[Andrwe]

BREAKING CHANGE

Because content filtering with Privoxy can slowdown loading websites a lot it is disabled now by default.
To enable it add the following line to your configuration which will activate all supported content filters again:

FILTERS=(
    attribute_global_name
    attribute_global_exact
    attribute_global_contain
    attribute_global_startswith
    attribute_global_endswith
    class_global
    id_global
)

During testing of these filters I got a slowdown of page loading up to 4 minutes.
This mostly depends on the amount of HTML-elements and general size of page.
The current implementation already tweaks the filters as much as possible.
Maybe additional tweaking can be done in the Privoxy configuration.

ADDED

• privoxy-blocklist: configuration & cli-flag to activate and control content-filter conversion
• test-suite: add configuration file to centralize test configurations
• test-suite: add http-server to test content filters without external dependencies
• test-suite: add tests for content filters
• test-suite: add tests for runtime errors (close runtime errors due to generated config #46 )

CHANGES

• privoxy-blocklist: change order of arguments of debug() to simplify writing messages
• privoxy-blocklist: apply shfmt fixes
• test-suite: add vim & curl to docker image to simplify debugging
• test-suite: move check_in() and check_not_in() to conftest.py to allow re-usage in different scripts

FIXED

• privoxy-blocklist: support for HTML element filter conversion (global filters only) (relates to Converter skips some html elements #8 )
• privoxy-blocklist: fix several runtime errors caused by conversion routine