otherwise the multi interface gets problems

when given in the curl_easy_setopt() and then parse them all on the first
curl_easy_perform() call instead.

interface

as well, as then we write the same data twice.

you set CURLOPT_PROXY to "".

by Craig Davison. Now we deal with the 'nread' variable correctly between
each header line.

function. For Location: following.

sourcedir if we're not using $(srcdir) properly.

find a case in which we need to remove this flag, we should most likely
write a configure check that detects when this flag is needed and when its
not.

basic ./ and ../ strip-off understanding, and this change introduces with.
test cases 49 - 52 test this.