[krbdev.mit.edu #6545] Fails to compile on QNX 6.4.1

[mkraai@beckman.com via RT]

Howdy,

When I try to compile krb5 1.7 on a QNX 6.4.1 machine, it fails.  There 
are a number of problems:

 * krb5 tries to include sys/errno.h, which doesn't exist, instead of 
errno.h, which does.
 * QNX does not define CERASE, etc.
 * The utmp structure doesn't have a ut_host member and the utmpx 
structure isn't declared.
 * krb5 doesn't know how to build shared libraries on QNX.
 * Some networking functions are provided by libsocket but applications 
which use them don't link against it.

The attached patch fixes these issues.

Matt


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