Job naming prefix in case of shared hosting

[maierwalter]

Possibility for prefixing name of jobs, so that if you have a shared hosting and 2 jobs with the same name that should run "onOneServer", it would still run for both environments. In case you don't have the property set in the env, the functionality will be the same without affecting current changes.

In order to solve this now, I have to add the prefix for each command in Kernel.

[Neol3108]

You should use config instead of env because env is not available when config is cached

[maierwalter]

I've made a mistake and did not notice, I am sorry, working on fixing it

[taylorotwell]

Thanks for your pull request to Laravel!

Unfortunately, I'm going to delay merging this code for now. To preserve our ability to adequately maintain the framework, we need to be very careful regarding the amount of code we include.

If applicable, please consider releasing your code as a package so that the community can still take advantage of your contributions!