[bug #28934] execve(path, args) should take path as a a relative path if it doesn't contain slashes

[Emilio Pozuelo Monfort]

Follow-up Comment #1, bug #28934 (project hurd):

btw the POSIX standard that makes me think path in execve() should always be
taken as a path (note the difference between path and file), from
http://www.opengroup.org/onlinepubs/000095399/functions/exec.html

"""
int execve(const char *path, char *const argv[], char *const envp[]);
int execlp(const char *file, const char *arg0, ... /*, (char *)0 */);
[...]
The argument path points to a pathname that identifies the new process image
file.

The argument file is used to construct a pathname that identifies the new
process image file. If the file argument contains a slash character, the file
argument shall be used as the pathname for this file. Otherwise, the path
prefix for this file is obtained by a search of the directories passed as the
environment variable PATH (see the Base Definitions volume of
IEEE Std 1003.1-2001, Chapter 8, Environment Variables). If this environment
variable is not present, the results of the search are
implementation-defined.
"""

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