Add settings examples for gocritic (#1562)

.golangci.example.yml

@@ -149,11 +149,44 @@ linters-settings:
     disabled-tags:
       - experimental
 
-    settings: # settings passed to gocritic
+    # Settings passed to gocritic.
+    # The settings key is the name of a supported gocritic checker.
+    # The list of supported checkers can be find in https://go-critic.github.io/overview.
+    settings: 
       captLocal: # must be valid enabled check name
+        # whether to restrict checker to params only (default true)
         paramsOnly: true 
+      elseif:
+        # whether to skip balanced if-else pairs (default true)
+        skipBalanced: true
+      hugeParam:
+        # size in bytes that makes the warning trigger (default 80)
+        sizeThreshold: 80
+      nestingReduce:
+        # min number of statements inside a branch to trigger a warning (default 5)
+        bodyWidth: 5
+      rangeExprCopy:
+        # size in bytes that makes the warning trigger (default 512)
+        sizeThreshold: 512
+        # whether to check test functions (default true)
+        skipTestFuncs: true
       rangeValCopy:
+        # size in bytes that makes the warning trigger (default 128)
         sizeThreshold: 32
+        # whether to check test functions (default true)
+        skipTestFuncs: true
+      ruleguard:
+        # path to a gorules file for the ruleguard checker
+        rules: ''
+      truncateCmp:
+        # whether to skip int/uint/uintptr types (default true)
+        skipArchDependent: true
+      underef:
+        # whether to skip (*x).method() calls where x is a pointer receiver (default true)
+        skipRecvDeref: true
+    	unnamedResult:
+        # whether to check exported functions
+        checkExported: true
   gocyclo:
     # minimal code complexity to report, 30 by default (but we recommend 10-20)
     min-complexity: 10