Prevent accidental lockouts #1045
Merged
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Closes #1044
Also fixes a bug in
visudowhere it would not consume the newline that was entered in a prompt.I've also tried to reformat the "redo until the sudoers file is acceptable" loop to make the control flow a little more clear.
Can be reviewed commit-by-commit.
I expect a6ccf9f to be a controversial commit and I can live without it.