Document RSAPublicKey_{in,out} options.

doc/apps/rsa.pod

@@ -24,6 +24,8 @@ B<openssl> B<rsa>
 [B<-check>]
 [B<-pubin>]
 [B<-pubout>]
+[B<-RSAPublicKey_in>]
+[B<-RSAPublicKey_out>]
 [B<-engine id>]
 
 =head1 DESCRIPTION
@@ -118,6 +120,10 @@ by default a private key is output: with this option a public
 key will be output instead. This option is automatically set if
 the input is a public key.
 
+=item B<-RSAPublicKey_in>, B<-RSAPublicKey_out>
+
+like B<-pubin> and B<-pubout> except B<RSAPublicKey> format is used instead.
+
 =item B<-engine id>
 
 specifying an engine (by its unique B<id> string) will cause B<rsa>
@@ -139,6 +145,11 @@ The PEM public key format uses the header and footer lines:
  -----BEGIN PUBLIC KEY-----
  -----END PUBLIC KEY-----
 
+The PEM B<RSAPublicKey> format uses the header and footer lines:
+
+ -----BEGIN RSA PUBLIC KEY-----
+ -----END RSA PUBLIC KEY-----
+
 The B<NET> form is a format compatible with older Netscape servers
 and Microsoft IIS .key files, this uses unsalted RC4 for its encryption.
 It is not very secure and so should only be used when necessary.
@@ -173,6 +184,10 @@ To just output the public part of a private key:
 
  openssl rsa -in key.pem -pubout -out pubkey.pem
 
+Output the public part of a private key in B<RSAPublicKey> format:
+
+ openssl rsa -in key.pem -RSAPublicKey_out -out pubkey.pem
+
 =head1 BUGS
 
 The command line password arguments don't currently work with