Update Install document with testing step and other minor changes.

to be used.  --without-subdir can be used to specify no subdirectory.

  default sysconfdir subdirectory is openldap instead of ldap.
    This removes conflicts with other ldap subsystems.  Should
    be configure option.
  *.conf files are now preserved.  A *.conf.default are always
    created with the latest conf.
  *.help and ldapfriendly are now placed in $(datadir)/$(ldap_subdir)
  updated man pages to reflect changes.

if strdup fails.  This is better than not checking, but we should
add orderly shutdown.

This still needs significant review!

Updates: command-line parsing of parameters for server, port and baseDN. Started ChangeLog, updated TODO and README.

	mail500 to use filters
	Kerberos autoconf support
	ISODE autoconf support
	contrib autoconf support