1.6.0 (#180)

* fix for #178

* restore options

* error codes

* update docs

* forget docs

* add option to auto forget

* add copy option

* update go version to enable generics

* copy docs

* changelog & version bump

docs/markdown/location/copy.md

@@ -0,0 +1,31 @@
+# Copy
+
+Instead of specifying multiple `to` backends for a given `location` you can also use the `copy` option. Instead of recalculating the backup multiple times, you can copy the freshly copied snapshot from one backend to the other, avoiding recomputation.
+
+###### Example
+
+```yaml | .autorestic.yml
+locations:
+  my-location:
+    from: /data
+    to:
+      - a #Fast
+      - b #Fast
+      - c #Slow
+```
+
+Becomes
+
+```yaml | .autorestic.yml
+locations:
+  my-location:
+    from: /data
+    to:
+      - a
+      - b
+    copy:
+      a:
+        - c
+```
+
+Instead of backing up to each backend separately, you can choose that the snapshot created to `a` will be copied over to `c`, avoiding heavy computation on `c`.