[sudo-users] SHA512 Passwords on Solaris Seems to Break Sudo Authentication in 1.8.11 to 1.8.12

[Todd C. Miller]

Starting with sudo 1.8.11, sudo will use the sha2 functions in the
Solaris C library instead of its own.  You can force configure to
ignore the sha2 in libc by doing:

    $ ac_cv_header_sha2_h=no ./configure ...

Unfortunately, I no longer have a working SPARC machine and Solaris
on intel doesn't exhibit the problem.

 - todd