[cups.bugs] [LOW] STR #4227: 1.6.1 custom filters don't work that worked in previous versions (1.4.8 for example)

[Michael Sweet]

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[STR Closed w/o Resolution]

Not sure we want to add an option to bypass the added checks - they are
there to keep the scheduler running reliably...

Link: https://www.cups.org/str.php?L4227
Version: 1.6.1
Fix Version: Will Not Fix