Re: update net/dnscrypt-proxy 2.0.42 and fix updating cache files

Here is a simplified update to net/dnscrypt-proxy 2.0.42. I leave the
bugfix to upstream, which plans to fix it. Once that bugfix comes, we
may have to add _dnscrypt-proxy:_dnscrypt-proxy ownership for
/var/dnscrypt-proxy in pkg/PLIST.

I posted Larry Hynes' bug report here:
https://github.com/DNSCrypt/dnscrypt-proxy/issues/1265

Changelogs:
https://github.com/DNSCrypt/dnscrypt-proxy/blob/2.0.42/ChangeLog
https://github.com/DNSCrypt/dnscrypt-proxy/blob/2.0.41/ChangeLog

Index: Makefile
===================================================================
RCS file: /cvs/ports/net/dnscrypt-proxy/Makefile,v
retrieving revision 1.52
diff -u -p -r1.52 Makefile
--- Makefile 23 Mar 2020 05:16:43 -0000 1.52
+++ Makefile 3 Apr 2020 09:29:14 -0000
@@ -4,7 +4,7 @@ COMMENT = flexible DNS proxy with suppor

GH_ACCOUNT = jedisct1
GH_PROJECT = dnscrypt-proxy
-GH_TAGNAME = 2.0.40
+GH_TAGNAME = 2.0.42

CATEGORIES = net

Index: distinfo
===================================================================
RCS file: /cvs/ports/net/dnscrypt-proxy/distinfo,v
retrieving revision 1.28
diff -u -p -r1.28 distinfo
--- distinfo 23 Mar 2020 05:16:43 -0000 1.28
+++ distinfo 3 Apr 2020 09:29:14 -0000
@@ -1,2 +1,2 @@
-SHA256 (dnscrypt-proxy-2.0.40.tar.gz) = F/lc+eOM6GSonc76MKTC4j14+zUUzTVnpg96DfwTPXg=
-SIZE (dnscrypt-proxy-2.0.40.tar.gz) = 2322600
+SHA256 (dnscrypt-proxy-2.0.42.tar.gz) = wADKThWcZgbLNHbqnjTtZLXEbHENcMxWUfFPESXI01I=
+SIZE (dnscrypt-proxy-2.0.42.tar.gz) = 2324442