Squashed 'cgilite/' changes from 1d27862..6bdb2db

Squashed 'cgilite/' changes from 1d27862..6bdb2db

6bdb2db style for search button
7680549 variable expiration times, clickable invitation links
38314fd detect https/http schema for invite links
98d46bf export user variables
b3075fd allow email quicklinks, bugfix pattern extractor in all inline links
d4b1cb4 variable $UID is reserved in bash and cannot be used
49a67fe metadata blocks
b406efc avoid odd margins in list items
2092bc6 user passphrase update, improved username form
2f3c712 allow invitation without email, allow setting user page url
e5e180a "cgilite_headers" among export variables
6cc62de reset header variables when processing multiple requests
b2b268b corrected paragraph splitting and hr/h2 distinction
33cd660 faster hexdecode for mixed data (e.g. post-data)
6fe824f API CHANGE: do not set session cookie automatically
a8f5776 enable pandoc fenced divs, and fenced code attributes
fabbc00 make hr tag visible again
47295e6 bugfix: prevent HTML injection in reference style link titles
882f37d markdown support for external macro plugin

git-subtree-dir: cgilite
git-subtree-split: 6bdb2dbf2cc57ab1938def5b678cbfe669f2d3b2