Change the RAND_file_name documentation accordingly

file. B<buf> points to a buffer of size B<num> in which to store the

filename.

On Windows the seed file is %RANDFILE% if that environment variable is set.

Otherwise the file is called ".rnd" in one of the following locations (in order

of preference): %TMP%, %TEMP%, %USERPROFILE%, %SYSTEMROOT%, %HOME%, "C:".

On all systems, if the environment variable B<RANDFILE> is set, its

value will be used as the seed file name.

On all other systems the seed file is $RANDFILE if that environment variable is

set, $HOME/.rnd otherwise.

Otherwise, the file is called ".rnd", found in platform dependent locations:

If $HOME (on non Windows systems) is not set either, or B<num> is

too small for the path name, an error occurs.

=over 4

=item On Windows (in order of preference)

%HOME%, %USERPROFILE%, %SYSTEMROOT%, C:\

=item On VMS

SYS$LOGIN:

=item On all other systems

$HOME

=back

If C<$HOME> (on non-Windows and non-VMS system) is not set either, or

B<num> is too small for the path name, an error occurs.

RAND_load_file() reads a number of bytes from file B<filename> and

adds them to the PRNG. If B<max_bytes> is non-negative,