[Rspamd] Wait for PHP to not break inotify

data/Dockerfiles/rspamd/Dockerfile

@@ -11,6 +11,7 @@ RUN apt-get update && apt-get install -y \
   gnupg2 \
   apt-transport-https \
   dnsutils \
+  netcat \
   && apt-key adv --fetch-keys https://rspamd.com/apt-stable/gpg.key \
   && echo "deb [arch=amd64] https://rspamd.com/apt-stable/ $CODENAME main" > /etc/apt/sources.list.d/rspamd.list \
   && echo "deb-src [arch=amd64] https://rspamd.com/apt-stable/ $CODENAME main" >> /etc/apt/sources.list.d/rspamd.list \