Add unit tests for getRelativerevision

Update changelog unit tests

ensure css loadfile test doesn't try to create a directory (and fail) if the directory already exists

Test to ensure less can parse the @import rewritten by css_loadfile()

This test is horrible, but I believe necessary to ensure that the
@import of less files actually works.

It is horrible as its n

Test to ensure less can parse the @import rewritten by css_loadfile()

This test is horrible, but I believe necessary to ensure that the
@import of less files actually works.

It is horrible as its not a unit test and its not a true functional
test. It probably implies the code in css_out() should be refactored
to make it easier to test intermediate results.

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additional tests where for relative path to @import less file

Improve css_loadfile() tests
- use TMP_DIR constant rather than /tmp
- swap order of parameters in csstest() to match reported 'expected' & 'actual'
- add tests for use of 'url()' in @import
- add te

Improve css_loadfile() tests
- use TMP_DIR constant rather than /tmp
- swap order of parameters in csstest() to match reported 'expected' & 'actual'
- add tests for use of 'url()' in @import
- add tests for @import of '.less' files (these test will fail per FS#2875)

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Fix the media usage index to include local links

ensure locale is set back to the original value

skip FS#2867 test if \s doesn't match \xA0 after attempting to change the locale

unittests for auth_loadACL

make sure HTTP test uses HTTP only and doesn't get redirected

more verbosity in test case

change error level to ignore notices

escaped another $ in mailer test

add tests for usernames with 2 & 3 byte utf8 characters

Fix the indexer indexing test case (changed the data but not the result)

Fix FS#2854: Treat numerically different keys as different

additional auth_nameencode tests (apostrophe & backslash)

swap order ot test parameters to match expected,actual as per documentation & test output

update tests for use with <THEAD> changes

also use DOKU_E_LEVEL in bootstrap's call to error_reporting()

set error level so it is propagated correctly to dokuwiki

add missing $_SERVER values for init.php when called from cli

Wrap thead around 1st row, when 1st cell at 1st row is tableheader. Implements FS#1764

remove '&' reference operator from metadata test, not required in php5