definitions from the global curl header and thus this needs to do it
themselves.

well. Removed the depedency on perl.

defines.

belong in the public header file. They are not in our name space so we
should not set them globally.

http://daniel.haxx.se/projects/roffit/

before we use it

a numeric argument can better bail out if given a weird parameter. This
catches situations such as "-y -Y 2000" or "-O -C [URL]" etc.

time.

by the maketgz script so in releases this is replaced by an actual string.