This reverts commit 524df576.

Conflicts:
	inc/lang/bn/lang.php
	inc/lang/fr/lang.php

this has been done by a script and might not be 100% accurate

When loading plugins, $lang might not be initialized yet, so use a
hardcoded error message instead, especially as this error should only be
displayed for the admin (and then fixed). This also removes the
previously localized message, it might be re-added as part of the new
extension manager.

Attention: $lang['register'] has been renamed to $lang['btn_register'],
anyone using that in any plugin or template should adjust it.

Ignore-this: 27ea52110bce929b2c61ed8faba67cfc

darcs-hash:20091016205526-c0bf4-35eba4e65d37980a667ba982f7f1ea5b7b07f01c.gz

Ignore-this: 7c8f68f29f52bc1d33fdb76ba98d2307

Removed unused string, move another string to the [js] subarray.

darcs-hash:20090812191138-6e07b-65db1b7560d437fb26a1a4d0095cd768b2c9af01.gz

Ignore-this: f6cee2527ab735c597edc8106bf17827

darcs-hash:20090331164408-5abfc-b24d80643640145caccf582f4c549d80482608ec.gz

Ignore-this: 8e911151013118f0d55c652bad0b4077

darcs-hash:20090323091848-23e95-32189fa400673ba510a92fba626da030307a5385.gz

Ignore-this: 751791b5c37807f4a4d7f79177162290

darcs-hash:20090203192649-7bfe7-f6c7a89ee4a142371f193ad60da91823e0901bfe.gz

darcs-hash:20081011143946-23886-78628e3ca7ec0c40f5d288c6a9832cd52b8b083b.gz