* Makefile.in: Remove cygserver stuff.

* acconfig.h: Add USE_CYGSERVER define.
* config.h.in: Regenerate.
* configure.in: Add --enable-server setting.
* configure: Regenerate.
* fhandler_tty.cc (fhandler_tty_slave::open): Conditionalize compilation of
cygserver stuff.
* fork.cc (fork_child): Ditto.
* shm.cc: Ditto.
* tty.cc (tty::common_init): Ditto.
* dcrt0.cc: Use bool rather than BOOL for CYGWIN environment variable
definitions.
* environ.cc: Ditto.
* ntea.cc: Ditto.
* security.cc: Ditto.
* security.h: Ditto.
* syscalls.cc (check_posix_perm): Remove externs that were already declared in
a header.
* winsup.h: Ditto.  Declare _MT_SAFE here.  Delete it someday since cygwin
should always be _MT_SAFE.

winsup/cygwin/security.cc

@@ -40,12 +40,11 @@ details. */
 #include "lm.h"
 #include "pwdgrp.h"
 
-extern BOOL allow_ntea;
-BOOL allow_ntsec;
+bool allow_ntsec;
 /* allow_smbntsec is handled exclusively in path.cc (path_conv::check).
    It's defined here because of it's strong relationship to allow_ntsec.
    The default is TRUE to reflect the old behaviour. */
-BOOL allow_smbntsec;
+bool allow_smbntsec;
 
 cygsid *
 cygsidlist::alloc_sids (int n)