php: expose per-call host override option, review feedback

src/php/ext/grpc/call.c

@@ -244,15 +244,9 @@ PHP_METHOD(Call, __construct) {
   wrapped_grpc_timeval *deadline =
       (wrapped_grpc_timeval *)zend_object_store_get_object(
           deadline_obj TSRMLS_CC);
-  if (host_override != NULL) {
+  call->wrapped = grpc_channel_create_call(
-    call->wrapped = grpc_channel_create_call(
+      channel->wrapped, NULL, GRPC_PROPAGATE_DEFAULTS, completion_queue, method,
-        channel->wrapped, NULL, GRPC_PROPAGATE_DEFAULTS, completion_queue, method,
+      host_override, deadline->wrapped, NULL);
-        host_override, deadline->wrapped, NULL);
-  } else {
-    call->wrapped = grpc_channel_create_call(
-        channel->wrapped, NULL, GRPC_PROPAGATE_DEFAULTS, completion_queue, method,
-        NULL, deadline->wrapped, NULL);
-  }
 }
 
 /**

src/php/ext/grpc/channel.c

@@ -64,7 +64,6 @@ void free_wrapped_grpc_channel(void *object TSRMLS_DC) {
   if (channel->wrapped != NULL) {
     grpc_channel_destroy(channel->wrapped);
   }
-  efree(channel->target);
   efree(channel);
 }
 
@@ -174,8 +173,6 @@ PHP_METHOD(Channel, __construct) {
     }
     efree(args.args);
   }
-  channel->target = ecalloc(target_length + 1, sizeof(char));
-  memcpy(channel->target, target, target_length);
 }
 
 /**

src/php/ext/grpc/channel.h

@@ -53,7 +53,6 @@ typedef struct wrapped_grpc_channel {
   zend_object std;
 
   grpc_channel *wrapped;
-  char *target;
 } wrapped_grpc_channel;
 
 /* Initializes the Channel class */