Check_process improvements

- Fix set -eu and set -u
Suggest forcing levels 4 and 5:
- **Level 4**: The app does not support LDAP and HTTP auth and is single
user only. However, it is set as passwordless and protected behind the
SSO. All users can share the same CouchPotato instance to manage their
collective libraries.
- **Level 5**: I suppose linter is fine. The failure is the result of
this problem (which I can't explain):
https://github.com/YunoHost/package_linter/issues/15

check_process

@@ -20,3 +20,14 @@
         fail_download_source=0
         port_already_use=1  (5050)
         final_path_already_use=0
+;;; Levels
+    Level 1=auto
+    Level 2=auto
+    Level 3=auto
+    Level 4=1
+    Level 5=1
+    Level 6=auto
+    Level 7=auto
+    Level 8=0
+    Level 9=0
+	Level 10=0

scripts/remove

@@ -1,5 +1,6 @@
 #!/bin/bash
-	#set -eu
+	
+	set -u
 	app=$YNH_APP_INSTANCE_NAME
 
 # Source app helpers

scripts/restore

@@ -1,4 +1,6 @@
 #!/bin/bash
+
+	set -eu
 	app=$YNH_APP_INSTANCE_NAME
 
 # Source app helpers

scripts/upgrade

@@ -1,4 +1,6 @@
 #!/bin/bash
+
+	set -eu
 	app=$YNH_APP_INSTANCE_NAME
 	source="https://github.com/CouchPotato/CouchPotatoServer"