The -f switch is accepted by insmod, but silently ignored. This
causes the user to wonder why things don't work. As insmod is
most often used with "evil" modules, -f is almost default and
thus needs to work.
Signed-off-by: Philippe De Swert <philippe.deswert@jollamobile.com>
Make the includes be libkmod/libkmod.h for code outside of library. This
fixes the broken build after 1315123 ('build-sys: Don't add libkmod
subdirectory to include path').
When user supplied --help/-h, program should output to stdout the usage,
not to stderr. It's the expected behavior, what the user asked for,
not something to log or an error.
