Add support for printing out and retrieving EC point formats extension.

(backport from HEAD)

apps/s_apps.h

@@ -161,6 +161,7 @@ int set_cert_key_and_authz(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key,
                            unsigned char *authz, size_t authz_length);
 # endif
 int ssl_print_sigalgs(BIO *out, SSL *s);
+int ssl_print_point_formats(BIO *out, SSL *s);
 int ssl_print_curves(BIO *out, SSL *s);
 #endif
 int ssl_print_tmp_key(BIO *out, SSL *s);