Different data type for HTTP response code

[lonnylot]

Depending on the transport implementation (cURL or PHP Streams) used when calling wp_remote_get the returned data type for the response code will be different. If cURL is used then it will be an integer. If PHP Streams are used it will be a string. Since the transport implementation is abstracted away it would make it easier if the data types of the returns would also be consistent.

[dd32]

In 29849:

Always cast the 'code' server response to an int, this provides consistency between both of the HTTP transports.
Previously cURL would return an int and Streams a numeric string.
Fixes #28887

[johnbillion]

In 29985:

Update the docs for wp_remote_retrieve_response_code(). See #28887.