Log Message:
Various fixes/cleanups to get this package compiling on Solaris:

 + Use the mnttab(4) interface instead of mntent.
 + C++ syntax cleanups to appease the SunPro compiler.
 + Use MAXPATHLEN instead of NAME_MAX which can be unimplemented on strict
   POSIX systems.
 + Use POSIX inttypes.h if BSD types are not available.
 + RPC includes and C++ namespace fixes.
 + Use dirent(3) instead of older sys/dir.h interface.
 + Avoid `sun' namespace collision.

Patch based on the work of Robert Lillack and others, described in
http://mail-index.netbsd.org/tech-pkg/2004/08/20/0005.html and tested with
SunPro and gcc.