do if the write would've blocked

part.

NULL set back the internal default function

header byte counter properly

can destroy the full allocated area just before we free it

my brain damaged fix to not parse spaces as part of the value is now fixed
to instead strip off trailing spaces from values.

domain starts with a dot.

make a different and more complicated check for when to include it

is updated even if everything is read in one single pass, as the windows
functions apparantly does more often than other systems.

Really, we should only #define this in one file, not both here and in
connect.c!

Reminder for the future: when we're using malloc() we MUST include <stdlib.h>
as otherwise 64bit archs go bananas.

Bug report #517687

was an extra CRLF added to the post data

content-type header, it was used for each part and thus without this it
failed MISERABLY. *smacks forhead*