include/ironbee/engine_types.h: Spell check.
clipp_test: Adding helper configuration values for loading Lua config and module files.
Waggle rules must tell the rule engine to pre-populate FIELD_NAME and related fields.
Moving a lua test to a lua test file.
Require the Waggle rule author to enable the rule meta flags.

This is done using the Waggle rule function set_rule_meta_fields().
For example:
    Rule("my_rule", "1"):
        fields('REQUEST_HEADERS'):
        op('!rx', '^$'):
        phase('REQUEST_HEADER'):
        set_rule_meta_fields():
        action('setvar:X=%{FIELD_NAME}')
build: Lua is no longer optional.
engine/tests/Makefile.am: Disable luajit with thread-sanitizer-workaround.
configure.ac: Fix bug in thread sanitizer workaround.
lua/tests/Makefile.am: Disable lua tests when using thread-sanitizer-workaround.
docs: Cleanup formatting of reference manual.
docs: Cleanup and expand inspection section of reference manual.