Convert % into %% in input string so printf won't barf

Add a script that allows a check file to be created by cutting and
pasting the contents of the square brackets in the "Excess nn bytes
from slave" message emitted when the director is running in verb

Add a script that allows a check file to be created by cutting and
pasting the contents of the square brackets in the "Excess nn bytes
from slave" message emitted when the director is running in verbose
mode (-v).

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