Validate path types (#9967)

* Validate path types

* Fix the year of header

* Update internal/ingress/controller/config/config.go

Co-authored-by: Jintao Zhang <tao12345666333@163.com>

---------

Co-authored-by: Jintao Zhang <tao12345666333@163.com>

internal/ingress/controller/config/config.go

@@ -830,6 +830,12 @@ type Configuration struct {
 	// http://nginx.org/en/docs/ngx_core_module.html#debug_connection
 	// Default: ""
 	DebugConnections []string `json:"debug-connections"`
+
+	// StrictValidatePathType enable the strict validation of Ingress Paths
+	// It enforces that pathType of type Exact or Prefix should start with / and contain only
+	// alphanumeric chars, "-", "_", "/".In case of additional characters,
+	// like used on Rewrite configurations the user should use pathType as ImplementationSpecific
+	StrictValidatePathType bool `json:"strict-validate-path-type"`
 }
 
 // NewDefault returns the default nginx configuration
@@ -1002,6 +1008,7 @@ func NewDefault() Configuration {
 		GlobalRateLimitMemcachedPoolSize:       50,
 		GlobalRateLimitStatucCode:              429,
 		DebugConnections:                       []string{},
+		StrictValidatePathType:                 false, // TODO: This will be true in future releases
 	}
 
 	if klog.V(5).Enabled() {