* Indirect redirects from directory to `index.html`
* Added `HTTP_DATA_INTERNAL_REDIRECT` compile-time option
* Added CLICON_RESTCONF_API_ROOT to clixon-config.yang
* Added 404 return without body if neither restconf, data or streams prefix match
* Fixed: HTTP/1 parse error for '/' path
Check data paths for .., ~ and soft links
Changed semantics of `CLICON_HTTP_DATA_PATH` and `_ROOT`
Change URI catch-all to 404 instead of 400
Fixed some memory leaks
Check of enable-http-data config option
HTTP/2 Return 400 bad request if no path match
Test: updated yang file revisions, extended restconf config with http-data
