It might not be available in GnuTLS and is not strictly required
by the gnurl manifest, see
http://www.git.taler.net/?p=gnurl.git;a=blob;f=README;h=f7521aa431a4e77a58dc558880ff54648d69e072;hb=HEAD#l22

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

gnurl's README states quite excatly which CONFIGURE_ARGS to pass,
so disable lots of unneeded stuff.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

Signed-off-by: Alexander Ryzhov <openwrt@ryzhov-al.ru>

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

This is definitely one of the ugliest things I ever got my
hands on. If it even did the job properly, but no, it tries
to install it's headers in /usr/include/curl collidings with
actual curl's headers. Fixed that by installing them into
/usr/include/gnurl instead. Now gnunet can use gnurl.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>