bug 1017: Support multiple formats on the client cert download page

Signed-off-by: Michael Tänzer <neo@nhng.de>
bug 1017: Always send certs in DER encoding and with content type
x-x509-user-cert on install which seems to be most portable except with IE
where we need another solution

Signed-off-by: Michael Tänzer <neo@nhng.de>
bug 1112: Changed the wot/4.php to entering a TTP request, the other file are needed for the process
bug 1112: Changed some wording
bug 782: Added a comment field to all certificate pages
Bug 782: Fix a minor typo causing a syntax error
Bug 782: fixed layout, change of comment not yet realised in overview 5.php
Merge branch 'bug-782' of git://git-cacert.it-sls.de/cacert-devel into bug-782
bug 782: added missing link to lib\check_weak_key.php
bug 782: changed insert sql (deleted intval) on account.php, adjustment text area
bug 782: Changed row id
bug 782: typo fix
bug 782: Update routine for description in includes/account.php, new view in pages/account/6.php, small changes in pages/account/5.php
bug 782:Took out braces that were to much
bug 782: added missing backticks around field names
bug 1112: fixed typos
bug 740:Changed text according to actual status
bug 740: changed small typo
bug 1121: introduced 4 new function into includes/notary.inc.php to process the cca recording, added the write_user_agreement to www/index.php and www/wot.php, added delete_user_agreement to the cron/removedead.php
bug 1122:created new file for the CCA overview and added short information about CCA into SE admin console