Reinstall the readline handler when we are called in order to clear the
input line. Tested in a variety of versions by scn and myself.

Fixes #1531

Reviewed by:	scoof

This is why it sucks to have the redhat/ directory inside
the source distribution.

Fixes: #1514

Round up the header space with PRNDUP in session space allocation to
fix alignment issue.

Fixes: #1327

ESI subrequests would mangle the t_open and t_resp timestamps of the
original requests, causing negative time and NAN being logged in
ReqEnd.

Fixes: #1297

Do as we have documented we do (and Apache does), printing the %D as
request time in microseconds, truncated to an integer value.

The pass bits of the oc's flags wasn't cleared before or'ing the new
pass on failing the busy object test in the ban lurker. This would
cause the pass not to be matched later, making the lurker spin on the
busy object.

Fixes: #1470

Document that our use of 0s as a magic constant had the side
effect of enabling grace if you tried to disable it in VCL, and
how to get it to work.

Merging tiny patch from:

    http://lists.freebsd.org/pipermail/freebsd-current/2010-January/015138.html

Fixes: #1448

Restart from vcl_pass and vcl_miss does not work, but was
documented that it did.

Mentioned in: #1443

Cherry pick changes from master to allow it.

Fixes: #1439

Junk after gzip body end would lead to a spinning
thread.

Fixes: #1086

Fixes: #1376

use "nm -an", not "nm -agn" which supresses local symbols.

Let backtrace_symbols() handle anything past _end.

Thanks to James Pearson for the suggestion.

We want VMODs to depend on the right ABI, so we need to provide
something they can depend on.  Do so, and hook that up with the RPM
build process.

trouble gets failed back without VCL involvement.

Fixes	#1367

Spotted by: Coverity

readline doesn't really handle when input comes from a file or pipe,
so only use readline if stdin is a tty.

Thanks to johnnyrun for a patch which was used for inspiration here.

Fixes #1314

Reset vfp when restarting in deliver, in case it has be set in
cnt_fetchbody already.

Fixes: #979