Markus Teich 65b8d52788 Revert "No need for usage()" ...

This reverts most of commit a6dc051e37 and fixes
some related stuff:

- keep spelling fixes from original commit
- make -h and -v also work when followed by more arguments
- any unknown flag prints usage
- fix output of -v to display "slock: version 1.3" instead of "slock: slock-1.3"

2016-02-15 14:25:17 +01:00

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