pdns-recursor: add package

Maintainer: me

Compile tested: armv7l, OpenWRT SDK
Run tested: armv7l Linksys WRT1900ACS, OpenWrt SNAPSHOT, r9987-655fff1571 -
confirmed PowerDNS recursor links correctly against libraries and runs on my
target environment.

Description:
PowerDNS Recursor is a high-performance resolving name server, utilizing
multiple processor and including Lua scripting capabilities.

This commit includes the recursive nameserver

https://www.powerdns.com/recursor.html

Signed-off-by: James Taylor <james@jtaylor.id.au>

net/pdns-recursor/patches/100-disable-recursor.conf-dist.patch

@@ -0,0 +1,15 @@
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -357,12 +357,6 @@
+ pubsuffix.cc: $(srcdir)/effective_tld_names.dat
+ 	$(AM_V_GEN)./mkpubsuffixcc
+
+-## Config file
+-sysconf_DATA = recursor.conf-dist
+-
+-recursor.conf-dist: pdns_recursor
+-	$(AM_V_GEN)./pdns_recursor --config > $@
+-
+ ## Manpages
+ MANPAGES=pdns_recursor.1 \
+ 	 rec_control.1