patch 8.0.1564: too many #ifdefs

Problem:    Too many #ifdefs.
Solution:   Graduate the +autocmd feature. Takes away 450 #ifdefs and
            increases code size of tiny Vim by only 40 Kbyte.

src/if_xcmdsrv.c

@@ -1480,14 +1480,12 @@ server_parse_message(
 		ga_concat(&(r->strings), str);
 		ga_append(&(r->strings), NUL);
 	    }
-#ifdef FEAT_AUTOCMD
 	    {
 		char_u	winstr[30];
 
 		sprintf((char *)winstr, "0x%x", (unsigned int)win);
 		apply_autocmds(EVENT_REMOTEREPLY, winstr, str, TRUE, curbuf);
 	    }
-#endif
 	    vim_free(tofree);
 	}
 	else