* bump to 4.7.0
* enable DNS over TLS (uses libssl which was already a dependency)
* add libcurl dependency for new zone-to-cache feature.

Co-Authored-By: wout@wbnet.eu
Signed-off-by: Peter van Dijk <peter.van.dijk@powerdns.com>

Signed-off-by: Peter van Dijk <peter.van.dijk@powerdns.com>

Removed upstreamed patch.

Refreshed other one.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

Signed-off-by: Rosen Penev <rosenp@gmail.com>

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>