cdn 6.x-2.0-rc2

The goal for 2.0 is simple: make the CDN module kick ass. This will be done in three ways:

1. ✓ significant expansion of functionality
2. ✓ awesome UI
3. excellent documentation, including high-quality screencasts

IMPORTANT NOTE:
The Drupal core patch has changed in beta 6 (not in this RC)! So, before updating, revert the patch of beta 3 (or from beta 2, if you're upgrading from beta 2). Then update the code. Then apply the new patch.

Changes since DRUPAL-6--2-0-RC1:

• Rewrote the "Description" section of the README for improved legibility.
• Fixed #935180 by mikeytown2: HTTPS check causes PHP notice
• Fixed the default value for the exceptions by path whitelist.
• Change the module's package from "Performance" to "Performance and scalability", which is more accurate, and is the same package as used by the JavaScript Aggregator module.
• #938616: Provide a fallback mechanism that uses the theme layer to rewrite file URLs
• #938638: Balance number of files served by each CDN instead of only looking at file type
• Only show the server in a file link in the page stats, if there actually is a server on which the file exists.
• #938670: Allow for Boost integration: provide a public API function that returns all CDN domains
• Fixed bug in cdn_advanced_get_servers().
• Follow-up patch for #938616 by mikeytown2 and wimleers: only load cdn.fallback.inc when it will actually be used.
• #939086: Allow cdn_pick_server() to be an actual function *or* some eval()'d PHP code
• Fixed all coder warnings.
• Fixed #940050 by Shellingfox: Undefined in cdn_file_url_alter() -- aka bug in https mode
• #940096 by Shellingfox and wimleers: New patch for ImageCache 2 (latest version in DRUPAL-6--2 branch)
• #939640: New type of exceptions: Drupal paths (or: disable the CDN on configurable Drupal paths)