feat(nslord,nsmaster): upgrade pdns to 4.2.0

nslord/Dockerfile

@@ -6,7 +6,7 @@ RUN apt-get update && apt-get install -y \
 		dirmngr gnupg \
 	--no-install-recommends && apt-get clean && rm -rf /var/lib/apt/lists/*
 
-RUN echo 'deb [arch=amd64] http://repo.powerdns.com/ubuntu bionic-auth-41 main' \
+RUN echo 'deb [arch=amd64] http://repo.powerdns.com/ubuntu bionic-auth-42 main' \
       >> /etc/apt/sources.list \
  && echo 'Package: pdns-*' \
       > /etc/apt/preferences.d/pdns \

nsmaster/Dockerfile

@@ -6,7 +6,7 @@ RUN apt-get update && apt-get install -y \
 		dirmngr gnupg \
 	--no-install-recommends && apt-get clean && rm -rf /var/lib/apt/lists/*
 
-RUN echo 'deb [arch=amd64] http://repo.powerdns.com/ubuntu bionic-auth-41 main' \
+RUN echo 'deb [arch=amd64] http://repo.powerdns.com/ubuntu bionic-auth-42 main' \
       >> /etc/apt/sources.list \
  && echo 'Package: pdns-*' \
       > /etc/apt/preferences.d/pdns \