Note i2d_re_X509_tbs and related changes in CHANGES

Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit e9128d9401ad617e17c5eb3772512c24b038b967)
make update

Sync libeay.num from 1.0.2

Reviewed-by: Dr Stephen Henson <steve@openssl.org>