Add /usr/sbin to path when looking for varnishd.
Pass VMOD_DIR to make distcheck

The VMOD_DIR returned from pkg-config does not take prefix and similar
variables into account. Make sure to pass an explicit VMOD_DIR that
the build process has write access to.

Fixes #8

Conflicts:
	Makefile.am
Include packaging and LICENSE files in distribution.

Conflicts:
	Makefile.am
Use correct unpack directory.

Conflicts:
	vmod-memcached.spec
Revert "Use correct unpack directory."

This reverts commit 2f4d2d3e86b41b4933c1bc85699c55057e7c3e37.
Use correct unpack directory.

Conflicts:
	vmod-memcached.spec
Help confused dependency resolver on EL7.

Conflicts:
	vmod-memcached.spec
Add debian packaging files.
Require recent autoconf.

On EL6 systems the packaged 2.63 version is missing AS_VAR_COPY.
This seems to have been added in 2.63b, released sometime in 2008.

With this commit we cut off any vmod development being done on
EL6 and earlier. (building and running should work)

Conflicts:
	configure.ac
Pass VMOD_DIR to make distcheck

The VMOD_DIR returned from pkg-config does not take prefix and similar
variables into account. Make sure to pass an explicit VMOD_DIR that
the build process has write access to.

Fixes #8

Conflicts:
	Makefile.am
Use automake variables instead.
Check that we have libvarnishapi during configure.