Made scripts optional

usr/lib/systemd/system/restic-backup@.service

@@ -1,7 +1,9 @@
 [Unit]
 Description=Backup with restic to Backblaze B2
-OnFailure=status-email-user@%n.service
-Requires=nm-unmetered-connection.service
+# Email on failure require special setup. See README.md
+#OnFailure=status-email-user@%n.service
+# Prevent backup on unmetered connection. Needs special setup. See README.md.
+#Requires=nm-unmetered-connection.service
 
 [Service]
 Type=simple

usr/lib/systemd/system/restic-backup@.timer

@@ -1,6 +1,5 @@
 [Unit]
 Description=Backup with restic on schedule
-Requires=nm-unmetered-connection.service
 
 [Timer]
 OnCalendar=daily

usr/lib/systemd/system/restic-check@.service

@@ -1,8 +1,10 @@
 [Unit]
 Description=Check restic backup Backblaze B2 for errors
-OnFailure=status-email-user@%n.service
+# Email on failure require special setup. See README.md
+#OnFailure=status-email-user@%n.service
 Conflicts=restic-backup.service
-Requires=nm-unmetered-connection.service
+# Prevent backup on unmetered connection. Needs special setup. See README.md.
+#Requires=nm-unmetered-connection.service
 
 [Service]
 Type=simple

usr/lib/systemd/system/restic-check@.timer

@@ -1,6 +1,5 @@
 [Unit]
 Description=Check restic backup Backblaze B2 for errors on a schedule
-Requires=nm-unmetered-connection.service
 
 [Timer]
 OnCalendar=monthly