track_vcl.inc: using the http_ prefix for HTTP headers (fully spelled like the header), logging X-Real-IP

Updated monitoring stats for MQ sends or fails, mutexing stats updates

to which the second arg of pthread_join points be allocated from outside
the thread, not from within the thread.

timeout, more detail in monitoring output)

because Perl's IO buffer is too small and can't be changed)

overwritten, never appended)

continues to run after child process restart)

Also updated to match puppet version (renamed file, exclude *.ico)

Also added the signal handler to dump the table's contents on USR1.

(generated by configure.ac)

(as in Varnish)

(from varnishlog -w), and a 'make check' target to run a
regression test.