Document rollback issues.

ssl/s23_clnt.c

diff --git a/ssl/s23_clnt.c b/ssl/s23_clnt.c
index 99a4358..5050a13 100644
--- a/ssl/s23_clnt.c
+++ b/ssl/s23_clnt.c
@@ -367,6 +367,7 @@
 
 		s->state=SSL2_ST_GET_SERVER_HELLO_A;
 		if (!(s->client_version == SSL2_VERSION))
+			/* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */
 			s->s2->ssl2_rollback=1;
 
 		/* setup the 5 bytes we have read so we get them from