Add setlocale() so the command line arguments that use floating

Add setlocale() so the command line arguments that use floating
point work in different locales.  Since sudo now logs the timing
data in the C locale we must Parse the seconds in the timing file
manually instead of using strtod().  Furthermore, sudo 1.7.3 logged
the number of seconds with the user's locale so if the decimal point
is not '.' try using the locale-specific version.