glob should work with aliased commands

[ctrlcctrlv]

> alias lls ls
> glob lls *
Unknown command `lls'.

While

> glob ls *

works.

[lavv17]

Aliases are expanded during command parsing, and glob modifies a completely parsed command when aliases have been expanded already. One way to fix it could be undo the parsing (call Combine, apply redirection and conditional execution) and use PrependCmd, but I doubt it is a nice thing to do.

The main problem is that aliases are not like shell functions, they are like a string substitution.

[lavv17]

added an entry to BUGS file.