doc: modify the comment in function libpqrcv_check_conninfo()

[ikedarintarof]

Hi,

The function 'libpqrcv_check_conninfo()' returns 'void', but the comment 
above says that the function returns true or false.
I've attached a patch to modify the comment.
Regard,
Rintaro Ikedadiff --git a/src/backend/replication/libpqwalreceiver/libpqwalreceiver.c b/src/backend/replication/libpqwalreceiver/libpqwalreceiver.c
index 02f12f2921..851bf44fd3 100644
--- a/src/backend/replication/libpqwalreceiver/libpqwalreceiver.c
+++ b/src/backend/replication/libpqwalreceiver/libpqwalreceiver.c
@@ -309,8 +309,8 @@ bad_connection:
  * local filesystem access to be attempted.
  *
  * If the connection string can't be parsed, this function will raise
- * an error and will not return. If it can, it will return true if this
- * connection string specifies a password and false otherwise.
+ * an error. If it can, it will do nothing if this connection string
+ * specifies a password and raise an error otherwise.
  */
 static void
 libpqrcv_check_conninfo(const char *conninfo, bool must_use_password)