Debianizing module

Merging modifications from Yakaz (@lampeh and (@ofavre)
from 53c2e28 upto 3588a9a

Conflicts:
	man/vmod_curl.rst
	src/tests/test06.vtc
	src/tests/test07.vtc
	src/vmod_curl.c
	src/vmod_curl.vcc
Merge branch 'debian-buildtools'