Add additional validation to swarming v1 distributor.

dm/api/distributor/swarming/v1/config.pb.go

 // Code generated by protoc-gen-go.
 // source: github.com/luci/luci-go/dm/api/distributor/swarming/v1/config.proto
 // DO NOT EDIT!
 
 /*
 Package swarmingV1 is a generated protocol buffer package.
 
 It is generated from these files:
         github.com/luci/luci-go/dm/api/distributor/swarming/v1/config.proto
         github.com/luci/luci-go/dm/api/distributor/swarming/v1/isolate_ref.proto
@@ skipping 42 matching lines @@
 }
 
 func (m *Config) GetIsolate() *Config_Isolate {
         if m != nil {
                 return m.Isolate
         }
         return nil
 }
 
 type Config_Swarming struct {
-        Host string `protobuf:"bytes,1,opt,name=host" json:"host,omitempty"`
+        Url string `protobuf:"bytes,1,opt,name=url" json:"url,omitempty"`
 }
 
 func (m *Config_Swarming) Reset()                    { *m = Config_Swarming{} }
 func (m *Config_Swarming) String() string            { return proto.CompactTextString(m) }
 func (*Config_Swarming) ProtoMessage()               {}
 func (*Config_Swarming) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0, 0} }
 
 type Config_Isolate struct {
         // The host of the isolate service, e.g. isolateserver.appspot.com.
-        Host string `protobuf:"bytes,1,opt,name=host" json:"host,omitempty"`
+        Url string `protobuf:"bytes,1,opt,name=url" json:"url,omitempty"`
         // The default assumed expiration period for execution results.
         Expiration *google_protobuf.Duration `protobuf:"bytes,2,opt,name=expiration" json:"expiration,omitempty"`
 }
 
 func (m *Config_Isolate) Reset()                    { *m = Config_Isolate{} }
 func (m *Config_Isolate) String() string            { return proto.CompactTextString(m) }
 func (*Config_Isolate) ProtoMessage()               {}
 func (*Config_Isolate) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0, 1} }
 
 func (m *Config_Isolate) GetExpiration() *google_protobuf.Duration {
         if m != nil {
                 return m.Expiration
         }
         return nil
 }
 
 func init() {
         proto.RegisterType((*Config)(nil), "swarmingV1.Config")
         proto.RegisterType((*Config_Swarming)(nil), "swarmingV1.Config.Swarming")
         proto.RegisterType((*Config_Isolate)(nil), "swarmingV1.Config.Isolate")
 }
 
 func init() {
         proto.RegisterFile("github.com/luci/luci-go/dm/api/distributor/swarming/v1/config.proto", fileDescriptor0)
 }
 
 var fileDescriptor0 = []byte{
         // 232 bytes of a gzipped FileDescriptorProto
-        0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x6c, 0x8f, 0x3d, 0x4b, 0x03, 0x41,
-        0x10, 0x86, 0x39, 0x91, 0x24, 0x8e, 0xdd, 0x56, 0xf1, 0x84, 0x20, 0x56, 0x36, 0xce, 0x10, 0x15,
-        0xc4, 0x3a, 0x36, 0xb6, 0x27, 0x88, 0xed, 0x7d, 0x65, 0x33, 0x70, 0x77, 0x73, 0xec, 0x87, 0xfa,
-        0xb7, 0xfd, 0x07, 0xc2, 0x7e, 0xa8, 0x45, 0x9a, 0x65, 0x99, 0xf7, 0x79, 0x66, 0x78, 0x61, 0xa7,
-        0xd9, 0x1d, 0x7c, 0x83, 0xad, 0x8c, 0x34, 0xf8, 0x96, 0xc3, 0x73, 0xab, 0x85, 0xba, 0x91, 0xea,
-        0x99, 0xa9, 0x63, 0xeb, 0x0c, 0x37, 0xde, 0x89, 0x21, 0xfb, 0x59, 0x9b, 0x91, 0x27, 0x4d, 0x1f,
-        0x5b, 0x6a, 0x65, 0xda, 0xb3, 0xc6, 0xd9, 0x88, 0x13, 0x05, 0x39, 0x79, 0xdb, 0x96, 0x1b, 0x2d,
-        0xa2, 0x87, 0x9e, 0x42, 0xd2, 0xf8, 0x3d, 0x75, 0xde, 0xd4, 0x8e, 0x65, 0x8a, 0xec, 0xf5, 0x77,
-        0x01, 0x8b, 0x5d, 0x90, 0xd5, 0x23, 0xac, 0xb2, 0xb8, 0x2e, 0xae, 0x8a, 0x9b, 0xf3, 0xbb, 0x4b,
-        0xfc, 0xdb, 0x84, 0x91, 0xc2, 0xd7, 0x34, 0xa9, 0x7e, 0x61, 0xf5, 0x00, 0x4b, 0xb6, 0x32, 0xd4,
-        0xae, 0x5f, 0x9f, 0x04, 0xaf, 0x3c, 0xe2, 0xbd, 0x44, 0xa2, 0xca, 0x68, 0xb9, 0x81, 0x55, 0xde,
-        0xa5, 0x14, 0x9c, 0x1e, 0xc4, 0xba, 0x70, 0xf6, 0xac, 0x0a, 0xff, 0xf2, 0x1d, 0x96, 0xc9, 0x39,
-        0x16, 0xab, 0x27, 0x80, 0xfe, 0x6b, 0xe6, 0x58, 0x26, 0xdd, 0xbd, 0xc0, 0xd8, 0x16, 0x73, 0x5b,
-        0x7c, 0x4e, 0x6d, 0xab, 0x7f, 0x70, 0xb3, 0x08, 0xf1, 0xfd, 0x4f, 0x00, 0x00, 0x00, 0xff, 0xff,
-        0x8a, 0xc8, 0xff, 0x58, 0x6d, 0x01, 0x00, 0x00,
+        0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x6c, 0x8f, 0x3d, 0x4b, 0xc4, 0x40,
+        0x10, 0x86, 0x89, 0xc2, 0xdd, 0x39, 0x36, 0xb2, 0xd5, 0x19, 0x45, 0xc4, 0xca, 0xc6, 0x19, 0x4e,
+        0x05, 0xb1, 0x3e, 0x1b, 0xdb, 0x08, 0xd7, 0xe7, 0x73, 0x1d, 0x48, 0x32, 0x61, 0xb3, 0xab, 0xfe,
+        0x69, 0xff, 0x83, 0xb8, 0x1f, 0x2a, 0x78, 0xcd, 0xb2, 0xcc, 0xfb, 0x3c, 0x33, 0xbc, 0xb0, 0xd5,
+        0x6c, 0x5f, 0x5d, 0x85, 0xb5, 0x0c, 0xd4, 0xbb, 0x9a, 0xfd, 0x73, 0xa3, 0x85, 0x9a, 0x81, 0xca,
+        0x89, 0xa9, 0xe1, 0xd9, 0x1a, 0xae, 0x9c, 0x15, 0x43, 0xf3, 0x7b, 0x69, 0x06, 0x1e, 0x35, 0xbd,
+        0x6d, 0xa8, 0x96, 0xb1, 0x63, 0x8d, 0x93, 0x11, 0x2b, 0x0a, 0x52, 0xb2, 0xdb, 0xe4, 0x17, 0x5a,
+        0x44, 0xf7, 0x2d, 0xf9, 0xa4, 0x72, 0x1d, 0x35, 0xce, 0x94, 0x96, 0x65, 0x0c, 0xec, 0xd5, 0x67,
+        0x06, 0x8b, 0xad, 0x97, 0xd5, 0x03, 0xac, 0x92, 0xb8, 0xce, 0x2e, 0xb3, 0xeb, 0xe3, 0xdb, 0x33,
+        0xfc, 0xdd, 0x84, 0x81, 0xc2, 0x97, 0x38, 0x29, 0x7e, 0x60, 0x75, 0x0f, 0x4b, 0x9e, 0xa5, 0x2f,
+        0x6d, 0xbb, 0x3e, 0xf0, 0x5e, 0xbe, 0xc7, 0x7b, 0x0e, 0x44, 0x91, 0xd0, 0xfc, 0x1c, 0x56, 0x69,
+        0x97, 0x3a, 0x81, 0x43, 0x67, 0x7a, 0x7f, 0xf5, 0xa8, 0xf8, 0xfe, 0xe6, 0x3b, 0x58, 0x46, 0xe3,
+        0x7f, 0xa8, 0x1e, 0x01, 0xda, 0x8f, 0x89, 0x43, 0x91, 0x78, 0xf3, 0x14, 0x43, 0x53, 0x4c, 0x4d,
+        0xf1, 0x29, 0x36, 0x2d, 0xfe, 0xc0, 0xd5, 0xc2, 0xc7, 0x77, 0x5f, 0x01, 0x00, 0x00, 0xff, 0xff,
+        0xe1, 0xd4, 0x8c, 0x80, 0x69, 0x01, 0x00, 0x00,
 }