Better support for symlinking instead of command option

[hadmut]

Hi,

i need to build a program which performs different action depending on the name it is called by symlinking (like busybox and some other do), i.e. instead of calling program command do a symlink ln -s program command and then just call it as command.

A simple
ARGV.unshift File.basename($0,'.rb')
does the job, but then the program does not respond to --help or help anymore.

Would be nice to get some support for that.