Support for Signal calls.

Merge in RedPhone

// FREEBIE

jni/openssl/crypto/pkcs7/doc

@@ -0,0 +1,24 @@
+int PKCS7_set_content_type(PKCS7 *p7, int type);
+Call to set the type of PKCS7 object we are working on
+
+int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
+	EVP_MD *dgst);
+Use this to setup a signer info
+There will also be functions to add signed and unsigned attributes.
+
+int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *p7i);
+Add a signer info to the content.
+
+int PKCS7_add_certificae(PKCS7 *p7, X509 *x509);
+int PKCS7_add_crl(PKCS7 *p7, X509_CRL *x509);
+
+----
+
+p7=PKCS7_new();
+PKCS7_set_content_type(p7,NID_pkcs7_signed);
+
+signer=PKCS7_SINGNER_INFO_new();
+PKCS7_SIGNER_INFO_set(signer,x509,pkey,EVP_md5());
+PKCS7_add_signer(py,signer);
+
+we are now setup.