- WARNS = 4
- factor out commonly used code.
- constify
- use warn/warnx instead of printf

constify printcapdb

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22366, verified by myself.

put fatal() and a some of variables used independantly of other functions
in common.c into separate files - this slighly cuts down size of pac(1)
not that it's really significant, but every bit count

put fatal() and a some of variables used independantly of other functions
in common.c into separate files - this slighly cuts down size of pac(1)
not that it's really significant, but every bit counts ....

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