Expose alloc functions for EC{PK,}PARAMETERS

Declare EC{PK,}PARAMETERS_{new,free} functions in public headers. The
free functions are necessary because EC_GROUP_get_ec{pk,}parameters()
was made public by commit 60b350a3 ("RT3676: Expose ECgroup i2d
functions").
Reviewed-by: NRich Salz <rsalz@openssl.org>
Reviewed-by: NMatt Caswell <matt@openssl.org>

doc/crypto/X509_dup.pod

@@ -39,6 +39,10 @@ DIST_POINT_NAME_new,
 DIST_POINT_free,
 DIST_POINT_new,
 DSAparams_dup,
+ECPARAMETERS_free,
+ECPARAMETERS_new,
+ECPKPARAMETERS_free,
+ECPKPARAMETERS_new,
 EDIPARTYNAME_free,
 EDIPARTYNAME_new,
 ESS_CERT_ID_dup,

include/openssl/ec.h

@@ -699,7 +699,9 @@ int EC_GROUP_have_precompute_mult(const EC_GROUP *group);
 /********************************************************************/
 
 DECLARE_ASN1_ITEM(ECPKPARAMETERS)
+DECLARE_ASN1_ALLOC_FUNCTIONS(ECPKPARAMETERS)
 DECLARE_ASN1_ITEM(ECPARAMETERS)
+DECLARE_ASN1_ALLOC_FUNCTIONS(ECPARAMETERS)
 
 /*
  * EC_GROUP_get_basis_type() returns the NID of the basis type used to

util/libcrypto.num

@@ -4203,3 +4203,7 @@ OPENSSL_utf82uni                        4149	1_1_0	EXIST::FUNCTION:
 PKCS12_add_friendlyname_utf8            4150	1_1_0	EXIST::FUNCTION:
 OPENSSL_uni2utf8                        4151	1_1_0	EXIST::FUNCTION:
 PKCS12_key_gen_utf8                     4152	1_1_0	EXIST::FUNCTION:
+ECPKPARAMETERS_free                     4153	1_1_0	EXIST::FUNCTION:EC
+ECPARAMETERS_free                       4154	1_1_0	EXIST::FUNCTION:EC
+ECPKPARAMETERS_new                      4155	1_1_0	EXIST::FUNCTION:EC
+ECPARAMETERS_new                        4156	1_1_0	EXIST::FUNCTION:EC