Otherwise comments are never visible in css.php

This avoids treating double slashes as single line comments in CSS when
they are used in a filter or content string.

closes #638

Web path was used instead of filesystem one.

source maps are invalid for our dispatched sources and may even cause
problems. this makes sure any sourcemap declarations are stripped from
the output

for backwards compatibility

double slashes in url() always have to be ignored

The regex wasn't properly escaped here which lead to problems when the
path contains backslashes. This is the root cause of the bug reported
at https://github.com/cosmocode/edittable/issues/19

locations corrected, when those values are "url(...)".

Explanation:  In the change to the less css extension, variable
replacements now happen after the less/css files are processed
for correction of relative locations.

This reverts commit 88833bac.
and fixes FS#2874

Fix violations for the following sniff
DokuWiki.Functions.OpeningFunctionBrace

Also removed an extraneous semicolon.

This is another go at what pull request #227 tried to do. This removes
support for a style.local.ini in the template file in preference of a
style.ini in the conf folder

This now gives proper files and line numbers for errors

This makes it possible to safely overwrite ini replacements from within
any less file

still needs testing

This prevents buffering of the cache file output.