Long delay during login

[Simon Rowe]

We're seeing a long delay when logging in using dropbear on to our embedded 
system (60MHz PowerPC). Looking at the debug from the client end it appears 
that the issue is the Diffie-Hellman key negotiation within dropbear

# ssh -vvv root at icu
...
debug2: dh_gen_key: priv key bits set: 124/256
debug2: bits set: 516/1024
debug1: sending SSH2_MSG_KEXDH_INIT
debug1: expecting SSH2_MSG_KEXDH_REPLY

[delay of about 8 seconds]

Is there anything we can change to reduce this delay?

	Thanks

		Simon