Make the `password_cmd` config setting work

Given a string from `password_cmd`, we should execute it as a shell
command and assume the result is a password. That password then gets
submitted to TimeTask's login form for authentication.

Had to do a bit of wrangling to get the command to execute by
`exec.Command()`, but managed to get it working in a bit of a roundabout
way.

Found these resources in my searches:
- https://stackoverflow.com/questions/39930109/golang-execute-command#39930127
https://stackoverflow.com/questions/28783637/how-to-make-golang-execute-a-string
- https://stackoverflow.com/questions/20437336/how-to-execute-system-command-in-golang-with-unknown-arguments
- https://github.com/codeskyblue/go-sh

0 files changed, 0 insertions, 0 deletions