check for unicode preg capabilities in UTF-8 lib FS#2636

We now have two defines for checking for UTF-8 and Unicode property
support in PREG and use them to work around FS#2636 on older systems.
compat js findPosX/y more closely mimic historical function
Czech language update
Merge pull request #140 from splitbrain/tar

New Tar Archive library
French language update
added another place to look for logo to make it more consistent (FS#2656)
removed a bunch of outdated and irrelevant networking acronyms
Typo fix for TL;DR
Merge pull request #144 from GeekShadow/patch-1

Typo fix for TL;DR
Revert "config manager: let PHP parse the config file"

This reverts commit b8f41ef0bac4e82cb3b02cd318efaddbaaeb1a78.

We had good reasons for parsing the file ourselves. For example to keep
expressions like 7*60*60*24 intact.
started to add some unit tests to config manager

Parsing the config file should be completely tested before we can rely
on it and safely extend it. This just adds the first very basic tests.
added failing test for array type
fixed wrong sidebar showing in namespaces when sidebar is disabled
changed semicolon to colon in link to welcome page to make it less confusing
Combine subsequent calls to strtr into a single transformation
Merge branch 'master' of git://github.com/borekb/dokuwiki into pull-request-84

* 'master' of git://github.com/borekb/dokuwiki:
  Colon is no longer rewritten to semicolon for IIS 7.x and for older versions of IIS, semicolon is displayed as is, not URL-encoded.

Conflicts:
	inc/common.php
Merge branch 'guide' of git://github.com/splitbrain/dokuwiki into pull-request-118

* 'guide' of git://github.com/splitbrain/dokuwiki:
  changed semicolon to colon in link to welcome page to make it less confusing
  added initial pages to not be ignored by git
  improved welcome text
  added welcome page
  changed the link in the installer to point to wiki:welcome

Conflicts:
	inc/lang/fr/lang.php
some welcome page changes
Galician language update
remove empty BCC/CC mail headers

Empty BCC/CC headers may cause errors on IIS.