Set TLSVerify=true by default for API endpoints

Option defaults in API must be the same as in CLI.

```
% podman image push --help
% podman image pull --help
% podman manifest push --help
% podman image search --help
```

All of these CLI commands them have --tls-verify=true by default:
```
--tls-verify  require HTTPS and verify certificates when accessing the registry (default true)
```

As for `podman image build`, it doesn't have any means to control
`tlsVerify` parameter but it must be true by default.

Signed-off-by: Vladimir Kochnev <hashtable@yandex.ru>

pkg/api/handlers/compat/images_build.go

@@ -140,6 +140,7 @@ func BuildImage(w http.ResponseWriter, r *http.Request) {
 		Registry:      "docker.io",
 		Rm:            true,
 		ShmSize:       64 * 1024 * 1024,
+		TLSVerify:     true,
 	}
 
 	decoder := r.Context().Value(api.DecoderKey).(*schema.Decoder)

pkg/api/handlers/compat/images_search.go

@@ -26,6 +26,7 @@ func SearchImages(w http.ResponseWriter, r *http.Request) {
 		ListTags  bool                `json:"listTags"`
 	}{
 		// This is where you can override the golang default value for one of fields
+		TLSVerify: true,
 	}
 
 	if err := decoder.Decode(&query, r.URL.Query()); err != nil {

pkg/api/handlers/libpod/images_push.go

@@ -32,6 +32,7 @@ func PushImage(w http.ResponseWriter, r *http.Request) {
 		TLSVerify        bool   `schema:"tlsVerify"`
 		Quiet            bool   `schema:"quiet"`
 	}{
+		TLSVerify: true,
 		// #14971: older versions did not sent *any* data, so we need
 		//         to be quiet by default to remain backwards compatible
 		Quiet: true,

pkg/api/handlers/libpod/manifests.go

@@ -310,6 +310,7 @@ func ManifestPush(w http.ResponseWriter, r *http.Request) {
 		TLSVerify bool `schema:"tlsVerify"`
 	}{
 		// Add defaults here once needed.
+		TLSVerify: true,
 	}
 	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
 		utils.Error(w, http.StatusBadRequest,

pkg/api/server/register_images.go

@@ -192,8 +192,8 @@ func (s *APIServer) registerImagesHandlers(r *mux.Router) error {
 	//  - in: query
 	//    name: tlsVerify
 	//    type: boolean
-	//    default: false
-	//    description: skip TLS verification for registries
+	//    default: true
+	//    description: Require HTTPS and verify signatures when contacting registries.
 	//  - in: query
 	//    name: listTags
 	//    type: boolean
@@ -1120,8 +1120,8 @@ func (s *APIServer) registerImagesHandlers(r *mux.Router) error {
 	//  - in: query
 	//    name: tlsVerify
 	//    type: boolean
-	//    default: false
-	//    description: skip TLS verification for registries
+	//    default: true
+	//    description: Require HTTPS and verify signatures when contacting registries.
 	//  - in: query
 	//    name: listTags
 	//    type: boolean

pkg/api/server/register_manifest.go

@@ -69,12 +69,12 @@ func (s *APIServer) registerManifestHandlers(r *mux.Router) error {
 	//    name: all
 	//    description: push all images
 	//    type: boolean
-	//    default: false
+	//    default: true
 	//  - in: query
 	//    name: tlsVerify
 	//    type: boolean
-	//    default: false
-	//    description: skip TLS verification for registries
+	//    default: true
+	//    description: Require HTTPS and verify signatures when contacting registries.
 	// responses:
 	//   200:
 	//     schema:
@@ -195,8 +195,8 @@ func (s *APIServer) registerManifestHandlers(r *mux.Router) error {
 	//  - in: query
 	//    name: tlsVerify
 	//    type: boolean
-	//    default: false
-	//    description: skip TLS verification for registries
+	//    default: true
+	//    description: Require HTTPS and verify signatures when contacting registries.
 	//  - in: body
 	//    name: options
 	//    description: options for mutating a manifest

test/apiv2/12-imagesMore.at

@@ -28,7 +28,10 @@ t GET libpod/images/$IMAGE/json 200 \
   .RepoTags[1]=localhost:$REGISTRY_PORT/myrepo:mytag
 
 # Push to local registry...
-t POST "images/localhost:$REGISTRY_PORT/myrepo/push?tlsVerify=false&tag=mytag" 200
+t POST "images/localhost:$REGISTRY_PORT/myrepo/push?tag=mytag" 200 \
+  .error~".*x509: certificate signed by unknown authority"
+t POST "images/localhost:$REGISTRY_PORT/myrepo/push?tlsVerify=false&tag=mytag" 200 \
+  .error~null
 
 # ...and check output. We can't use our built-in checks because this output
 # is a sequence of JSON objects, i.e., individual ones, not in a JSON array.

test/apiv2/15-manifest.at

@@ -31,6 +31,8 @@ t POST /v3.4.0/libpod/manifests/$id_abc/add images="[\"containers-storage:$id_ab
 t PUT /v4.0.0/libpod/manifests/$id_xyz operation='update' images="[\"containers-storage:$id_xyz_image\"]" 200
 
 t POST "/v3.4.0/libpod/manifests/abc:latest/push?destination=localhost:$REGISTRY_PORT%2Fabc:latest&tlsVerify=false&all=true" 200
+t POST "/v4.0.0/libpod/manifests/xyz:latest/registry/localhost:$REGISTRY_PORT%2Fxyz:latest?all=true" 400 \
+  .cause='x509: certificate signed by unknown authority'
 t POST "/v4.0.0/libpod/manifests/xyz:latest/registry/localhost:$REGISTRY_PORT%2Fxyz:latest?tlsVerify=false&all=true" 200
 
 # /v3.x cannot delete a manifest list