MFC: Add a quick (?) note for users who may be having sendmail interoperability issues      due to the recent (FreeBSD-SA-15:10.openssl) OpenSSL change to reject 512 bit      DH parameters.  Affects 11-CURRENT and 10-STABLE.
MFC: Add a quick (?) note for users who may be having sendmail interoperability issues
     due to the recent (FreeBSD-SA-15:10.openssl) OpenSSL change to reject 512 bit
     DH parameters.  Affects 11-CURRENT and 10-STABLE.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase