Merge branch 'develop' into features/draft-ietf-dnsop-dns-zone-digest

diff --cc Changelog
index c196fbd6e8fe5fb9ae755fd6ac3812625650ddc2,1568010dc33aa56cddbf5247bf6ebc6e1460e6be..42dd45264cc140eda6742239a590a3aa27485b1b
--- 1/Changelog
--- 2/Changelog
+++ b/Changelog
@@@ -12,7 -12,9 +12,10 @@@
        * Fix #92: ldns-testns.c:429:15: error: 'fork' is unavailable: not
          available on tvOS.
        * Fix for #93: fix packaging/libldns.pc Makefile rule.
 +      * ZONEMD support in ldns-signzone and ldns-verify-zone
+       * ldns-testns can answer several queries over one tcp connection,
+         if they arrive within 100msec of each other.
+       * Fix so that ldns-testns does not leak sockets if the read fails.
  
  1.7.1 2019-07-26
        * bugfix: Manage verification paths for OpenSSL >= 1.1.0