module request: execname

[Sam Steingold]

Bruno,

As mentioned in <http://article.gmane.org/gmane.comp.lib.gnulib.bugs/15446>, I 
would like to request a new module execname which would export 2 functions:

char *get_executable_name (void);
int find_executable (const char * program_name);

you already have all the necessary code in gnulib/lib/progreloc.c (apparently 
lifted with changes from clisp/src/execname.c), so all you need to do is 
extract the module and avoid the dependency creep.

Thanks.
Sam.