Default to installing setcap with an inheritable capability.

For my conveneince, default to installing an inheritable
file capability on setcap when installed. This requires the
process inherit a capability for it to take effect, but that's
what pam_cap is for...

You can disable this install feature with:

   make RAISE_SETFCAP=no install

Also, clean up Make files and a test, and add more comments.
The make files needed a fix (remove -lpam from pam_cap/Makefile)
and I've added a number of comments in support of various issues
folk have asked me about.

Signed-off-by: Andrew G. Morgan <[email protected]>
6 files changed