Avoids vcc errors from constructs like "std.log("Test: " + 1);"

Fixes: #1134

If the chosen backend is sick or fails to give us a connection,
we rescale the keys position in the backends window onto the
all the remaining backends.

The upside of this is that we get a stable and predicatable
hash distribution.

The downside of this is that you are very unlikely to spot the
healthy .weight=1 backend between two .weight=100 sick ones before
your retries run out.

Inspired by: patch from WaveCDN

Fixes a case where we might get a cache hit even though hash_always_miss is set.

Fixes: #1073

building against an uninstalled Varnish build tree.

datadir/varnish/include, and export these locations in the pkg_config
file.

Move it to a more natural home, as it is not really about libvmod_std,
and give it a name that matches it's function (inspired from libtool)

After the source tree restructure, the header files installed from
include/ needs the local directory hierarchy to be left intact. Mark
the pkginclude_HEADERS target nobase.

Fixes #1035

stream yet, we just pretend for some of the way)

Fix a couple of tests to DTRT accordingly.

Update some VSC descriptions while at it.

to do.

transferred to examine resp.bodylen instead of resp.http.content-length.

(This is in preparation for streaming being default)

This reverts commit 227a3944.

while we wait for it to establish CLI connection.

Polish vre.c a bit with respect to memory management and error messages.

Implemented more or less as described in the pcrejit(3) manpage, and
adds some compatibility defines for use with older pre-8.20 libraries
that do not have this functionality.

Fixes: #1080

whitespace with asserts.

and 'import ... from ...'.  Default is on (= no change)

subsequent changes.

Submitted by:	Brad Smith <brad@comstyle.com>

Thanks to Jeff Williams for pointing this out.