Modified main makefile to support local Make-common.  Builds file
from Make-common.dist.

and setting of variables from Make-platform with defaults in Make-common.

Protects createtimestamp and creatorsname.

Cleaned up LDAP_CRYPT support.

standard.  Was working as is only because pthread_attr_t is normally
a struct.  However, on some systems it may be a integer.