sshrsa.c now obeys the RFC793 Robustness Principle when it comes to

the ordering of the primes in a fully specified RSA private key:
when the key format typically has p > q, it will always output p > q
but be willing to tolerate p < q on input. (Inspired by seeing an
OpenSSH-format key file in the wild which had p < q, which I've
never seen before; I suspect a third-party application incautiously
generating the format.)

git-svn-id: svn://svn.tartarus.org/sgt/putty@8201 cda61777-01e9-0310-a592-d414129be87e