ITS#4677 Fix typo

doc/man/man3/ldap_extended_operation.3

@@ -62,7 +62,7 @@ The
 .B ldap_extended_operation()
 works just like
 .BR ldap_extended_operation_s() ,
-but the operation is asynchornous.  It provides the message id of
+but the operation is asynchronous.  It provides the message id of
 the request it initiated in the integer pointed to be \fImsgidp\fP.
 The result of this operation can be obtained by calling
 .BR ldap_result(3).