tigefa4u projects Trac

Fix regression in notification mail formatting introduced in [2123] (I hope).

Help the garbage collector a little.

* Update/cleanup `INSTALL` file
* Remove stale Docbook version of the TracGuide

TracDiff: merged with trunk (log:trunk#2089:2138)

Links like `source:#1` and `log:#1:3` should be equivalent to `source:/#1` and `log:/#1:3`

Show resolution for ticket closure event in timeline.

Set correct mime-types for gifs and pngs.

Added an option for not highlighting CamelCase links when the targeted pages are missing.

However, the link is still shown as missing if the CamelCase link
is enclosed in a description (e.g. `[wiki:DocumentThis To be documented]`
or even `[wiki:DocumentThis]`).

The behavior is made consistent for all the wiki rendering.

For enabling this feature, add the following to the [wiki:TracIni trac.ini]:
{{{
[wiki]
ignore_missing_pages = true
}}}

Should close #476.

''This changeset is dedicated to Pierre Brengard''

Wiki syntax enhancements:

* Make the scheme part of TracLinks conform to RFC 2396 (closes #1968)
* WikiPageNames must begin on a word boundary (closes #1974)
* TracLinks content can be quoted with `"..."` or `'...'` also when
a label is provided (closes #1967)
* Small refactoring of the pre/post rules, making the regexps easier
to understand and eventually customize.

Adapt to changes to static resource handling in [2132].