Add documentation for some of the missing environment variables.
Where document already exists, it has been linked to.
@@ -74,6 +74,19 @@ See L<SSL_CTX_load_verify_locations(3)>.
Additional arguments for the L<tsget(1)> command.
+=item B<OPENSSL_ia32cap>, B<OPENSSL_sparcv9cap>, B<OPENSSL_ppccap>, B<OPENSSL_armcap>, B<OPENSSL_s390xcap>
+
+OpenSSL supports a number of different algorithm implementations for
+various machines and, by default, it determines which to use based on the
+processor capabilities and run time feature enquiry. These environment
+variables can be used to exert more control over this selection process.
+See L<OPENSSL_ia32cap(3)>, L<OPENSSL_s390xcap(3)>.
+
+=item B<NO_PROXY>, B<HTTPS_PROXY>, B<HTTP_PROXY>
+
+Specify a proxy hostname.
+See L<OSSL_HTTP_parse_url(3)>.
+
=back
=head1 COPYRIGHT
