* Avoid assignments in comparisons.
* (hushed) Change type of found to bool.
* Add brackets.
* Always check if the user or the shell is in
the file. Do not check the first character of the line first. This
is simpler and match better with the HUSHLOGIN_FILE documentation.
Files with no license use the default 3-clauses BSD license. The copyright
were mostly not recorded; they were updated according to the Changelog.
"Julianne Frances Haugh and contributors" changed to "copyright holders
and contributors".
