Allow wildcard in executable names

[SuperSandro2000]

I want to ignore all nix commands which have the style nix, nix-build, nix-shell, etc. This is currently not possible cause wildcard can only ignore whole directories.

[dim-an]

Yeah, implementing good wildcard matching algorithm like in zsh looked pretty complicated, so in current version I've used simple algorithm that covers most of my needs.

Though it would be nice feature to have.

[SuperSandro2000]

I think this is pretty easily possible with https://godoc.org/github.com/minio/minio/pkg/wildcard

[dim-an]

https://godoc.org/github.com/minio/minio/pkg/wildcard

I would like glob matching to be similar to the shell behavior. And it looks like this package doesn't handle / correctly.

I checked a bunch of go globbing libraries a while ago and didn't find one that I would like to use. So I think that we need to go the hard way and implement globbing ourselves. :)

I would like our globbing to support at least following expressions:
~/ -- for home directory
* -- for matching files inside directory
** -- for matching hierarchies of directories

And I also would like to see our globbing to be as consistent with zsh as possible.

If someone would like to implement such feature here is the code to look at.

Unfortunately right now I'm pretty busy with my main work and family and cannot promise that I can look at it in near future.

[SuperSandro2000]

~/ -- for home directory

Replace ~ at the beginning with $HOME.

I don't use zsh and I don't think it is required for now to get its more regex like globbing.

I would simply replace the * handling code to get my problem fixed and leave the other things to you.

[SuperSandro2000]

I did a PR with minios wildcard parsing #27.

I hacked it quickly together and you probably shouldn't merge it like this but it works for my usecase.