[sudo-workers] Sudo with krb5 build problem (and solution) on AIX 5.3

[Todd C. Miller]

In message <4FF50465-ABA2-4EF6-BA4C-D858F32890DE at ualberta.ca>
	so spake kamil Marcinkowski (kamil):

> Sudo version 1.6.9p9 krb5 support will not build on a IBM power5-550  
> AIX 5.3 without the -lkrb5support flag.

Thanks for the report.  I'll add a check for -lkrb5support to the
configure script.

 - todd