fix 64+ character TSIG keys
fix hmac-md5 TSIG key lookup

Conflicts:
	pdns/dnspacket.cc
make sure to run PKG_PROG_PKG_CONFIG before the first PKG_* usage
Merge pull request #1154 from mind04/auth-3.3.1

TSIG fixes
Replace hardcoded make with variable

This fixes a warning when running make -j n
Merge pull request #1159 from mind04/auth-3.3.1

Final set of auth-3.3.1 suggestions
ok, so it turns out that poll, select and a few other system calls can return EINTR when we receive and interrupt, and we need to manually restart. man 7 signal makes for good reading on this case, as does http://blog.reverberate.org/2011/04/eintr-and-pc-loser-ing-is-better-case.html
remove experimental status from direct-dnskey