Configure option '--with-ssh1' breaks openssh-7.3p1

[Darren Tucker]

OK, with this additional information I can now reproduce it.

Based on some quick experiments it seems to be triggered when sshd is
built --with-ssh1 and the config does not *load* a Protocol 1 host
key.

Works:
Protocol=1,2 + Hostkey not specified
Protocol=1,2 + Hostkeys for both protocols specified.

Doesn't work:
Protocol=2 + Hostkey not specified.
Protocol=1,2 + Hostkeys specified only for Protocol 2.
Protocol=2 + Hostkeys specified for both protocols.

-- 
Darren Tucker (dtucker at zip.com.au)
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