abilian: provide ipv6 address to flask app

software/abilian/extranet_spr/instance-environment.cfg.in

@@ -11,6 +11,7 @@ PGHOST=$${:PGDATA}
 PGUSER=postgres
 ABILIAN_CONFIG=${abilian-config:location}/${abilian-config:filename}
 EXTRANET_INSTANCE_PATH=$${directories:extranet_spr-instance}
+EXTRANET_INSTANCE_HOST=$${instance-parameters:ipv6-random}
 ABILIAN_CONFIG_EXTRA_PYTHON=$${config-staging-py:rendered}
 ABILIAN_CONFIG_EXTRA_JSON=$${buildout:directory}/partition-parameters.json:$${json-extra-configuration:json-output}
 LD_LIBRARY_PATH=${cairo:location}/lib:${glib:location}/lib:${pango:location}/lib
@@ -28,6 +29,7 @@ inline =
     export PGUSER=$${instance-environment:PGUSER}
     export ABILIAN_CONFIG=$${instance-environment:ABILIAN_CONFIG}
     export EXTRANET_INSTANCE_PATH=$${instance-environment:EXTRANET_INSTANCE_PATH}
+    export EXTRANET_INSTANCE_HOST=$${instance-environment:EXTRANET_INSTANCE_HOST}
     export ABILIAN_CONFIG_EXTRA_PYTHON=$${instance-environment:ABILIAN_CONFIG_EXTRA_PYTHON}
     export ABILIAN_CONFIG_EXTRA_JSON=$${instance-environment:ABILIAN_CONFIG_EXTRA_JSON}
     export LD_LIBRARY_PATH=$${instance-environment:LD_LIBRARY_PATH}