Remove the single breaking filter_input[INPUT_SERVER]

Fixes #254
Merge pull request #263 from x-team/issue-254

Remove the single breaking filter_input[INPUT_SERVER]
Apply filters to stream query SQL
Revert "Apply filters to stream query SQL"

This reverts commit 062c6bff8daa9a3071b2e94085e8631f2a30adfd.
[issue-266] Apply filters to $sql
[issue-266] Document `wp_stream_query` filter
Minor improvement to docblock
Merge pull request #268 from x-team/issue-266

Issue 266: Allow stream query to be filterable
Merge branch 'develop' into issue-257

Conflicts:
	includes/log.php