software/beremiz-runtime: add md5sum option

Use md5sum to check if what we download is what we actually got.

software/beremiz-runtime/buildout.hash.cfg

 [instance-profile]
 filename = instance.cfg.in
-md5sum = 9da5ea88824bdbf233d65c756b4cadbc
+md5sum = 928e0850bd68162c1b72e7281b59a4ee

software/beremiz-runtime/instance-input-schema.json

@@ -7,6 +7,11 @@
       "description": "The network (http / https) address of the gzipped PLC source project program file.",
       "type": "string",
       "default": ""
+    },
+    "md5sum": {
+      "description": "The md5sum of the downloaded gzipped PLC source project program file. If empty, md5sum is not checked.",
+      "type": "string",
+      "default": ""
     }
   }
 }

software/beremiz-runtime/instance.cfg.in

@@ -18,6 +18,7 @@ offline = true
 recipe = slapos.recipe.build:download-unpacked
 offline = false
 url = ${instance-parameter:configuration.runtime_plc_url}
+md5sum = ${instance-parameter:configuration.md5sum}
 
 [instance-parameter]
 recipe = slapos.cookbook:slapconfiguration