Compressed content skipped. Content of size 78 was truncated to 74

gzip or deflate compressed content fails to parse with a message like:

WARN  parse.ParserJob - https://rustyx.org/temp/index%20bbb skipped. Content of size 78 was truncated to 74

The root cause is that the original (compressed) Content-Length is stored in the headers, while the content is stored uncompressed. Subsequently the Content-Length doesn't match the stored content size.

See attached patch that fixed the issue by removing Content-Length from the headers if it contains compressed value.