Squashed 'cgilite/' changes from fa0f919..238f0f8

Squashed 'cgilite/' changes from fa0f919..238f0f8

238f0f8 rudimentary debug function
b8cec22 more escapes for use in html-sh and HTTP headers
4a73c71 limit escaping to necessary characters, more readable output, much faster escaping functions
5b013b6 bugfix: allow empty query string
7e6d863 improved handling of Connection header
87f88f1 quicker path sanitizing
06edc60 sanitizing and security
73550e0 updated copyright line
5a99761 speed improvements
7335b73 allow empty script headers
f0383ee bugfix, STRING and UNSTRING input like "foo[bar]"
0d6196d faster STRING and UNSTRING functions

git-subtree-dir: cgilite
git-subtree-split: 238f0f8a2932b5ba66f7139c227eaaeb5dd7a013