Fixed all-stable-safe.ecf fusion
For maintenance filter, response with http status code {HTTP_STATUS_CODE}.service_unavailable
Do not try to read more bytes from input than provided Content-Length value.
fixed code for test_url_encoder
Improved BASE64 to update has_error when decoding.
Added manual tests.
Moved implementation of WSF_PERCENT_ENCODER into "encoder" library, and added the *partial* variant.
Updated encoder library, especially URL encoders to reuse implementation of percent_encoder.e
Fixed JSON_ENCODER for %T and related.
Updated related autotest cases.