Coding Standards: Move wp-includes/class-http.php to wp-includes/class-wp-http.php.

This renames the file containing the `WP_Http` class to conform to the coding standards.

This commit also includes:

- A new `class-http.php` that includes the new file, for anyone that may've been including the file directly.
- Replaces references to the old filename with the new filename.

Follow-up to [8516], [13274], [33748].

Fixes #54389. See #53359.
Built from https://develop.svn.wordpress.org/trunk@52026


git-svn-id: http://core.svn.wordpress.org/trunk@51618 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-http-curl.php

@@ -115,7 +115,7 @@ class WP_Http_Curl {
 			/** This filter is documented in wp-includes/class-wp-http-streams.php */
 			$ssl_verify = apply_filters( 'https_local_ssl_verify', $ssl_verify, $url );
 		} elseif ( ! $is_local ) {
-			/** This filter is documented in wp-includes/class-http.php */
+			/** This filter is documented in wp-includes/class-wp-http.php */
 			$ssl_verify = apply_filters( 'https_ssl_verify', $ssl_verify, $url );
 		}