doc/man3/d2i_X509.pod: add {d2i,i2d}_DSA_PUBKEY in NAME section

Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4584)

doc/man3/d2i_X509.pod

@@ -46,6 +46,7 @@ d2i_DSAPrivateKey,
 d2i_DSAPrivateKey_bio,
 d2i_DSAPrivateKey_fp,
 d2i_DSAPublicKey,
+d2i_DSA_PUBKEY,
 d2i_DSA_PUBKEY_bio,
 d2i_DSA_PUBKEY_fp,
 d2i_DSA_SIG,
@@ -217,6 +218,7 @@ i2d_DSAPrivateKey,
 i2d_DSAPrivateKey_bio,
 i2d_DSAPrivateKey_fp,
 i2d_DSAPublicKey,
+i2d_DSA_PUBKEY,
 i2d_DSA_PUBKEY_bio,
 i2d_DSA_PUBKEY_fp,
 i2d_DSA_SIG,