RulesParser: drop comment from tokens to prevent warning

Signed-off-by: Gregory M. Turner <gmt@be-evil.net>
RulesParser: hint that EOF errors may be due to missing semicolons

Signed-off-by: Gregory M. Turner <gmt@be-evil.net>
RulesParser: testparse method for quick experiments

Signed-off-by: Gregory M. Turner <gmt@be-evil.net>
RulesParser: if statement scaffolding

Signed-off-by: Gregory M. Turner <gmt@be-evil.net>
RulesParser: productions for thus-far parseable if statements

Signed-off-by: Gregory M. Turner <gmt@be-evil.net>