Update hints.

doc/install/hints/FreeBSD

@@ -2,6 +2,7 @@ The following FreeBSD ports and packages may be useful:
 	databases/db		Berkeley DB2
 	databases/gdbm		GNU Database Manager
 	devel/autoconf		GNU Autoconf
+	devel/libtool		GNU Autoconf
 	devel/gdb		GNU Debugger
 	lang/egcs		EGCS enhanced GNU C Suite
 	security/tcp_wrappers	TCP Wrappers
@@ -10,5 +11,5 @@ FreeBSD 3.0
 	no special options
 
 FreeBSD 2.2.5 (and prior?)
-	requires --without-preemptive
+	requires --without-yielding-select or --without-threads
 

doc/install/hints/Solaris

@@ -19,6 +19,9 @@ proper Pthreads libraries:
 	LIBS="-lpthread -lposix4"
 	./configure
 
-to use OR disable threads: 
+OR use Solaris (LWP) Threads
+	./configure --with-threads=lwp
+
+OR disable threads: 
 	./configure --without-threads