Remove lint

SAFEMEMCPY.  AC_FAST_MEMCPY has a len==1 optimization for use
in -llber.

macros into our namespace and limit use to headers.  A subsequent
round will add macros to separately handle forward declarations
of variables from declaration of function prototypes.  The last
round will add additional macros for declaring actual variables and
functions.

See README 1.27 log

Fix LDAP_HI 0x377 vs 0377 bug.

Remove memory.h/malloc.h inclusion from <ac/string.h>.
Need to s/<stdlib.h>/<ac/stdlib.h> everywhere.

Add #undef and other protection of macros.

Implementation no longer uses strtok_r(), it may be broken
or have an odd prototype.
Update configure not to check for strtok/strtok_r nor require
strtok_r to LDAP_API_FEATURE_X_OPENLDAP_REENTRANT.

when symbol being replaced was defined as a macro.

libldap/string.c will hold various string.h replacements.
Removed liblutil/strdup.c
Moved ldap_pvt_strtok to string.c.
Moved prototype of ldap_pvt_strtok to <ac/string.h>.
Added #define strtok_r ldap_pvt_strtok (if strtok_r doesn't exist).

Fixed my own stupid mistake of not noticing the 'n' in #ifndef. strdup
should work as it was again...

Updates for the new threading and utility stuff in libldap{_r}.

Clarify a few comments.

strdup(), strcasecmp(), strncasecmp().  Should test to see
if these are truely needed.  Hopefully their addition will
not break other platforms.