Update Solaris hints (remove pthread_create hint).

Add new README.

doc/install/hints/README

+For latest platform hints, see:
+	http://www.openldap.org/faq/index.cgi?file=9

doc/install/hints/Solaris

@@ -6,31 +6,5 @@ Sun Solaris Hints
 Latest Solaris hints are available at:
   http://www.openldap.org/faq/index.cgi?file=10
 
-Solaris 2.6, pthread_create() in -lc
-
-The Standard C library (-lc) contains pthread functions which
-are not compatible with <pthread.h> and are not useable.  The
-autoconf system will detect this incompatibility but does not
-attempts to resolve it.  configure will exit using
-out-of-the-box settings with the error:
-  checking if pthread_create() works... no
-  configure: error: pthread.h and pthread_create are not compatible
-
-To resolve this problem, the installer must specify the
-proper Pthreads libraries:
-  LIBS="-lpthread -lposix4"; export LIBS
-  ./configure
-
-On some versions of Solaris, you may be able to use Solaris LWP
-Threads:
-  ./configure --with-threads=lwp
-
-On some versions of Solaris, you may be able to build without
-threads.
-  ./configure --without-threads
-
-
-NDBM on Solaris
-
 Solaris NDBM and OpenLDAP appears to be incompatible.  Use
 Berkeley DB2 or GDBM.