Update all deprecated images' short descriptions to include prominent "DEPRECATED"

crux/README-short.txt

@@ -1 +1 @@
-CRUX is a lightweight Linux distribution targeted at experienced Linux users
+DEPRECATED; lacking active maintainer

known/README-short.txt

@@ -1 +1 @@
-Blogging, meet social. Known is a social publishing platform.
+DEPRECATED; lacking active maintainer

opensuse/README-short.txt

@@ -1 +1 @@
-DEPRECATED - for current images by the openSUSE Project see opensuse/leap and opensuse/tumbleweed.
+DEPRECATED; for current images by the openSUSE Project see opensuse/leap and opensuse/tumbleweed.

rapidoid/README-short.txt

@@ -1 +1 @@
-Rapidoid is a high-performance HTTP server and modern Java web framework / application container.
+DEPRECATED; lacking active maintainer

sentry/README-short.txt

@@ -1 +1 @@
-Sentry is a realtime, platform-agnostic error logging and aggregation platform
+DEPRECATED; https://develop.sentry.dev/self-hosted/

sourcemage/README-short.txt

@@ -1 +1 @@
-Source Mage is a source-based GNU/Linux distribution with maximum flexibility in customization.
+DEPRECATED; lacking active maintainer

swarm/README-short.txt

@@ -1 +1 @@
-Classic Swarm is no longer actively developed; use Swarm mode built into the Docker Engine instead
+DEPRECATED; use "docker swarm init" instead

thrift/README-short.txt

@@ -1 +1 @@
-Thrift is a framework for generating client and services from an IDL.
+DEPRECATED; lacking active maintainer