progreloc: Speed up executable lookup on various platforms. * lib/progreloc.c: Include <errno.h>. (safe_read, full_read): New functions. (find_executable): On GNU/kFreeBSD, FreeBSD, DragonFly, NetBSD, Solaris, prefer the information from the /proc file system to a PATH search.

#include <config.h>
#define _GL_U64_INLINE _GL_EXTERN_INLINE
#include "u64.h"
typedef int dummy;