Log Message:
khard: update to 0.17.0.

v0.17.0: 2020-08-13
- Do not modify (clean up) search query to find more matches (4583efd)
- Remove special search handling for phone numbers (a570a85)
- Remove extra pruning from email, phone and postaddress subcommand (3f315f9, \ 
1b9ce98, c704ce1)
- Add query syntax for search terms (#131)
- Add newline at the end of "show --format=pretty" (#256)
- Add -H to select header from which add-email should read (#258)
- Expand environment variables in paths in the config file (#269)
- Deprecate --strict-search (the new query syntax can be used instead)