Does rbac-tool support lookup serviceaccount with exact namespace name

[zl6ct]

What would you like to be added:

I would like to know can I lookup the serviceaccount with namespace. When I try to use the command like
rbac-tool lookup default It won't show the namespace of serviceaccount default. It will only show the namespace of rolebinding and it will be blank if it is a clusterrolebinding.

[gadinaor-r7]

@zl6ct - right now this is not directly supported with the command itself -e.g. using a command line parameter.

Straight forward workaround is to use awk on the namespace column:
rbac-tool lookup default | awk '$4 ~ /your_regex/'

[gadinaor-r7]

@zl6ct - happy to take a PR if you'd like to enhance it.

[gadinaor-r7]

@zl6ct would love that !!

[ravisastryk]

@gadinaor-r7 @zl6ct I have added support so it can help other users needing this feature. Feel free to review and merge
#124