KalturaCE installer miscalculates server root

KalturaCE assumes that the DocumentRoot setting does not have a trailing slash, which AFAIK is valid (although not recommended).

Sites which have a trailing slash on their Apache Document Root are not able to install KalturaCE. The symptoms are that the installer will complete successfully, but doesn't show a meaningful error message after the KalturaClient fails to generate the admin user account in registerLocalAccount.

The Kaltura installer doesn't handle this because it does an rtrim($path,'/') for $CE_abs_path and doesn't do the same for $server_root.

Attached is a patch which resolves this, although an alternate solution is to remove the trailing slash from your Apache2 DocumentRoot setting (it won't hurt). This patch also includes a couple of typo fixes, and the fix from http://www.kaltura.org/database-errors-installation-not-shown although I'm unsure if it's required.

If you are affected by this rtrim bug, you will find that the settings in KALTURA_ROOT/kaltura/alpha/config/kConf.php do not reflect the correct URL; you'll see settings like this instead, and your post-install "Continue" button will point to a 404 page.

@Kaltura team, please consider adding "patch" at the allowed extensions list :)

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