[rewrite] Introduce cname target rewrite rule to rewrite plugin (#6004)

* cname target rewrite part in answer sec
tion

Signed-off-by: amila <amila.15@cse.mrt.ac.lk>

* upstream request

Signed-off-by: amila <amila.15@cse.mrt.ac.lk>

* fix looping issue

Signed-off-by: amila <amila.15@cse.mrt.ac.lk>

* support exact, prefix, suffix, substring, and regex types for cname rewrite

Signed-off-by: amila <amila.15@cse.mrt.ac.lk>

* support any qtype, corrected prefix, suffix, substring types behavior

Signed-off-by: amila <amila.15@cse.mrt.ac.lk>

* unit tests added, mocked the upstream call

Signed-off-by: amila <amila.15@cse.mrt.ac.lk>

* fix lint errors

Signed-off-by: amila <amila.15@cse.mrt.ac.lk>

* add newline to fix test issue

Signed-off-by: amila <amila.15@cse.mrt.ac.lk>

* add default rewrite type, add readme

Signed-off-by: amila <amila.15@cse.mrt.ac.lk>

* readme grammar fix

Signed-off-by: amila <amila.15@cse.mrt.ac.lk>

* reuse rewrite types

Signed-off-by: amila <amila.15@cse.mrt.ac.lk>

* comment fixed

Signed-off-by: amila <amila.15@cse.mrt.ac.lk>

---------

Signed-off-by: amila <amila.15@cse.mrt.ac.lk>

plugin/rewrite/reverter.go

@@ -41,7 +41,7 @@ func NewRevertPolicy(noRevert, noRestore bool) RevertPolicy {
 
 // ResponseRule contains a rule to rewrite a response with.
 type ResponseRule interface {
-	RewriteResponse(rr dns.RR)
+	RewriteResponse(res *dns.Msg, rr dns.RR)
 }
 
 // ResponseRules describes an ordered list of response rules to apply
@@ -91,7 +91,7 @@ func (r *ResponseReverter) WriteMsg(res1 *dns.Msg) error {
 
 func (r *ResponseReverter) rewriteResourceRecord(res *dns.Msg, rr dns.RR) {
 	for _, rule := range r.ResponseRules {
-		rule.RewriteResponse(rr)
+		rule.RewriteResponse(res, rr)
 	}
 }