feat: Adapt to @aelsabbahy map[string][]string suggestion

* See https://github.com/goss-org/goss/pull/1013/files#r2070757415

Author: riton

docs/gossfile.md

@@ -336,7 +336,8 @@ http:
     request-headers: # Set request header values
        - "Content-Type: text/html"
     request-query-params:
-       foo: 'bar'
+       foo:
+          - 'bar'
     headers: [] # Check http response headers for these patterns (e.g. "Content-Type: text/html")
     request-body: '{"key": "value"}' # request body
     body: [] # Check http response content for these patterns

system/http.go

@@ -36,7 +36,7 @@ type DefHTTP struct {
 	resp               *http.Response
 	RequestHeader      http.Header
 	RequestBody        string
-	RequestQueryParams map[string]string
+	RequestQueryParams map[string][]string
 	Timeout            int
 	loaded             bool
 	err                error
@@ -166,8 +166,10 @@ func (u *DefHTTP) setupReal() error {
 
 	if u.RequestQueryParams != nil {
 		qParams := req.URL.Query()
-		for k, v := range u.RequestQueryParams {
-			qParams.Add(k, v)
+		for k, params := range u.RequestQueryParams {
+			for _, param := range params {
+				qParams.Add(k, param)
+			}
 		}
 		req.URL.RawQuery = qParams.Encode()
 	}

util/config.go

@@ -42,7 +42,7 @@ type Config struct {
 	RequestBody           string
 	Proxy                 string
 	RequestHeader         []string
-	RequestQueryParams    map[string]string
+	RequestQueryParams    map[string][]string
 	RetryTimeout          time.Duration
 	RunLevel              string
 	Server                string