no pthread_detach().  So, augment pthread_create() in default libraries
test to detach created thread.

  tcp_close -> closesocket
  ioctl -> ioctlsocket
Modify codes to use tcp_close() instead of close() for sockets.
Modify ioctl codes to be compatible with WINSOCK.

Modify slapd_tester to use pid_t and wait macros.  May need to
implement additional macros in ac/wait.h (in addition to
WEXITSTATUS and WIFEXITED).

the lock is acquired.  Add comments to that effect.  Remove
unnecessary busy loops from slapd/lock.c and slurpd/lock.c.

library, not header.  Eliminate need for <ac/unistd.h> to sometimes
include <fcntl.h> and/or <sys/file.h>.  Change lock API to expect
fd not FILE*.  Allows wider use and eliminates requirement that
lutil_lockf.h depencency on stdio.h.
Implemented lockf, fcntl, and flock locking in lutil/lockf.c.
Additional implementations (including no-op) may be needed.
Update slapd/lock.c and slurpd/lock.c to use new API.

liblutil/lockf.c wont be compiled.

(libtool, though, will drag it for it's use...)

libraries.  Original work test is still used to valid detected
header/library are compatible.

the environment.  A more general solution is needed.

being renamed through modrdn/moddn. This in preparation to add support
for MODDN v3.

ignore input when connection is closing.

changes to closing.  Need to add protection against read set races.