Log Message:
newsraft: update to 0.26

- add tab characters rendering in plain text content
- add -e option to execute certain actions without getting into the
  menus
- add support for rdf-namespaced rss 1.0 feeds
- add support for relative links in feed elements
- add support for yyyy-mm-dd and yyyy/mm/dd dates in feeds
- add support for style attributes within cells of html tables
- make items menu regenerate upon returning from items menu obtained
  via goto-feed action
- make date parsing less strict
- report exit status of failed shell commands
- fix storing http headers behavior according to rfc9111 (4.3.4)
- fix difference in compiler flags between primary executable and test programs
- delete update-threads-count setting