build: re-enable revive linters

In this commit:

75dfdbf211593cea ci: revert revive settings back to fix lint

We accidentally disabled all the revive linters. Unfortunately setting
the rules clears the default set of rules so it is necessary to
mention all rules that we need.

.golangci.yml

@@ -33,23 +33,67 @@ issues:
       - staticcheck
       text: 'SA1019: "github.com/rclone/rclone/cmd/serve/httplib" is deprecated'
 
+  # don't disable the revive messages about comments on exported functions
+  include:
+    - EXC0012
+    - EXC0013
+    - EXC0014
+    - EXC0015
+
 run:
   # timeout for analysis, e.g. 30s, 5m, default is 1m
   timeout: 10m
 
 linters-settings:
   revive:
+    # setting rules seems to disable all the rules, so re-enable them here
     rules:
-      - name: unreachable-code
-        disabled: true
-      - name: unused-parameter
-        disabled: true
+      - name: blank-imports
+        disabled: false
+      - name: context-as-argument
+        disabled: false
+      - name: context-keys-type
+        disabled: false
+      - name: dot-imports
+        disabled: false
       - name: empty-block
         disabled: true
+      - name: error-naming
+        disabled: false
+      - name: error-return
+        disabled: false
+      - name: error-strings
+        disabled: false
+      - name: errorf
+        disabled: false
+      - name: exported
+        disabled: false
+      - name: increment-decrement
+        disabled: true
+      - name: indent-error-flow
+        disabled: false
+      - name: package-comments
+        disabled: false
+      - name: range
+        disabled: false
+      - name: receiver-naming
+        disabled: false
       - name: redefines-builtin-id
         disabled: true
       - name: superfluous-else
         disabled: true
+      - name: time-naming
+        disabled: false
+      - name: unexported-return
+        disabled: false
+      - name: unreachable-code
+        disabled: true
+      - name: unused-parameter
+        disabled: true
+      - name: var-declaration
+        disabled: false
+      - name: var-naming
+        disabled: false
   stylecheck:
     # Only enable the checks performed by the staticcheck stand-alone tool,
     # as documented here: https://staticcheck.io/docs/configuration/options/#checks