caddy-frontend: Cleanup var/auth-ready

Slaves can disapper during handling of authentication, which will result
with prepared reservation, but with any chance to mark that it's ready.

software/caddy-frontend/buildout.hash.cfg

@@ -102,7 +102,7 @@ md5sum = 1c866272ec0ea0c161f0c0d80cb6e584
 
 [profile-kedifa]
 filename = instance-kedifa.cfg.in
-md5sum = b757e0409ec3e70679a8fc4aab4a065f
+md5sum = 40fe46a1fe653406b18ca46351d195b8
 
 [template-backend-haproxy-rsyslogd-conf]
 _update_hash_filename_ = templates/backend-haproxy-rsyslogd.conf.in

software/caddy-frontend/instance-kedifa.cfg.in

@@ -280,9 +280,19 @@ command =
   [ ! -f ${:file} ] && {{ software_parameter_dict['curl'] }}/bin/curl -s -g -X POST https://[${kedifa-config:ip}]:${kedifa-config:port}/reserve-id --cert ${kedifa-config:certificate} --cacert ${kedifa-config:ca-certificate} > ${:file}.tmp && mv ${:file}.tmp ${:file}
 update-command = ${:command}
 
-[auth-random]
+[cleanup-auth-ready]
+# Cleans auth-ready as some slaves can appear and be configured, but then
+# become removed before auth-random kicks in
 recipe = slapos.recipe.build
 directory = ${directory:auth-ready}
+init =
+  import os
+  if os.path.isdir(options['directory']):
+    os.system("find %s -type f -name *-auth-random -size 0 -delete" % (options['directory'],))
+
+[auth-random]
+recipe = slapos.recipe.build
+directory = ${cleanup-auth-ready:directory}
 auth-ready = ${directory:auth-ready}/${:_buildout_section_name_}
 init =
   import os