This should be the choice of the application to "retry" on exception, otherwise let the framework handle this in the lower part.
Better handling of response termination (alias commit)
Added the notion of "status_committed"
- added RFC1123 http date format helper
- added put_cookie_with_expiration_date as DATE_TIME
REQUEST: added `execution_variable' to provide a way to keep object attached to the request
and indexed by a string. A typical usage is a SESSION object
- HTTP_HEADER.string does not have the ending CRLFCRLF .. but just CRLF
- WGI_RESPONSE.write_header_text has the responsibility to handle the last blank line CRLF (separating the header from the message)
- HTTP_HEADER.string does not set anymore a default content type as text/html
- added WGI_RESPONSE.write_header_lines (ITERABLE [TUPLE [name,value: READABLE_STRING_8]] mainly as an helper method,
this way the WGI user does not have to know about the CRLF end of line
