Put back sprintf -> snprintf changes which have been lost accidentally in the
last update.

Merge OpenBSD specific changes:
- pexecute implementation replaced with the older gcc 2.95 implementation,
as gcc 2.95's collect2 relies upon an implementation behaviour which has
been lost in further libiberty updates.
- keep the old hash table interfaces, which are used by gcc 2.95.
- keep the OpenBSD replacement for the md5 interface.
- keep the OpenBSD strl{cat,cpy} and snprinft usage.

Bump libiberty minor version due to the addition of a few new symbols.

use snprintf. okay deraadt@

branches: 1.1.1;
Initial revision