asu: improve packaging

* use gunicorn instead of Flask for main server threads
 * generate and deploy random database password
 * provide distribution files

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

devel/asu/files/asu.defaults

@@ -1,15 +1,22 @@
 #!/bin/sh
 
-asu_tables="$(ls -1 /usr/lib/*/site-packages/asu/utils/tables.sql | head -n 1)"
+asu_password=$(dd if=/dev/urandom bs=16 count=1 2>/dev/null | sha256sum | cut -d' ' -f1)
+asu_tables="$(ls -1 /usr/lib/python*/site-packages/asu/utils/tables.sql | head -n 1)"
+
 uci -q batch <<EOF
 	del postgresql.asu
 	set postgresql.asu=postgres-db
 	set postgresql.asu.name=asu
 	set postgresql.asu.user=asu
-	set postgresql.asu.pass=password
+	set postgresql.asu.pass='$asu_password'
 	set postgresql.asu.script='$asu_tables'
 	commit postgresql
 EOF
 
-sed -i 's/database_user:.*/database_user: asu/' /etc/asu/config.yml
-sed -i 's/database_pass:.*/database_pass: asu/' /etc/asu/config.yml
+sed -i "s/database_user.*/database_user: asu/" /etc/asu/config.yml
+sed -i "s/database_pass.*/database_pass: $asu_password/" /etc/asu/config.yml
+
+cp -r /usr/lib/python*/site-packages/asu/utils/distributions /etc/asu/
+
+chown -R root:asu /etc/asu
+chmod -R g+rX /etc/asu