Update man/dknewkey.1 to mention use of k= with RSA and bump version for release.

man/dknewkey.1

@@ -135,7 +135,7 @@ dknewkey
 Generates new DKIM public/private key pairs
 .SH "VERSION"
 .IX Header "VERSION"
-0\.7\.0
+0\.7\.1
 
 .SH "DESCRIPTION"
 .IX Header "DESCRIPTION"
@@ -148,7 +148,9 @@ BITS_REQUIRED variable. ed25519 keys do not have a variable size.
 For RSA keys, it uses openssl to do the generation.  By default it assumes
 this is located at /usr/bin/openssl.  This is controlled by the OPENSSL_BINARY
 variable.  For ed25519 keys, PyNaCl (python-nacl in Debian and derivatives) is
-used.
+used.  For RSA keys k=2ha256 is now included in the public DNS record to
+prevent inadvertent use with the now obsolete sha1 hash algorithm (See RFC
+8301).
 
 .SH "USAGE"
 .IX Header "USAGE"