Lex-related fixes.

* mu-aux/gylwrap (@yysym): Add more symbols from lex.
* mh/mh_alias_lex.l (mh_alias_read): Return meaningful value.

@@ -291,6 +291,7 @@ mh_alias_read (char const *name, int fail)
   rc = yyparse ();
   mu_stream_ioctl (mu_strerr, MU_IOCTL_LOGSTREAM,
 		   MU_IOCTL_LOGSTREAM_SET_MODE, &old_mode);
+  return rc;
 }
 
 void

@@ -202,7 +202,26 @@ my @yysym = qw(
      yytable  
      yycheck  
      yyname   
-     yyrule   
+     yyrule
+
+     yy_create_buffer
+     yy_delete_buffer
+     yy_flex_debug
+     yy_init_buffer
+     yy_flush_buffer
+     yy_load_buffer_state
+     yy_switch_to_buffer
+     yyin
+     yyleng
+     yylex
+     yylineno
+     yyout
+     yyrestart
+     yytext
+     yywrap
+     yyalloc
+     yyrealloc
+     yyfree
 );
 
 our $VERSION = '1.00';