fix compiler warnings by including ac/unistd.h and only declaring copy_hostent() when we actually need to use it

s/LDAP_PF_UNIX/LDAP_PF_LOCAL/ so that we actually declare ldap_connect_to_path(). Also fix the decleration to match the function

+       Fixed -lldap SASL got_max_ssf bug
+       Fixed -lldap TCP_NODELAY bug
+       Fixed -llutil sa_flags never set bug
+       Removed lint
plus
	clients/tools ldap_init() fixes
	-lldap SASL fixes
	binary syntax ";binary" transfer change

Fixed -lldap TLS issues (ITS#733)
Fixed -lldap_r NT threads (ITS#732)
Fixed slapd/ldbm DB_PRIVATE not set bug (ITS#725)
Fixed slapd/ldbm nextid reporting bug
Fixed slapd syntaxes/mr routines (ITS#739)
Fixed slurpd -r buffer overflow (ITS#722)
Added slapd syntax/mr routines
Added slapd allow/disallow options
Added slapd defaultSearchBase and DN verify (ITS#723)
Build Environment
  Added Corba & Java Schema
  Updated MSVC projects for BDB 3.1