initial non-working dnsdist
it compiles & appears to function somewhat: dnsdist
cleanup code a bit, add statistics
make numer of outstanding packets per downstream configurable, plus make sure we don't exceed it
add qps statistics
make dnsdist spread load to remote with least amount of queue, add primitive timeout code
add 'use downstream with smallest queue' scheduler
Merge branch 'dnsdist'
drop --enable-recursor; add --enable-tools, preparing for core/tools packaging split. Thanks to Nido Media of #autotools for autoconf/automake help

Conflicts:
	pdns/Makefile.am
update pdns-tools rpm
add pdns-tools deb
only install tool manpages when --enable-tools is given
include dnstcpbench manual page
recursive make considered harmful
correct recursive make invocation
make sure we dist man dnstcpbench
improve check_process() in start_test_stop
zone2ldap/2sql manpages are not part of tools, thanks Kees Monshouwer
Merge pull request #879 from mind04/check-process

improve check_process() in start_test_stop
nit