man/openrc-run.8: Clarify documentation on dependencies and keywords
man/openrc-run.8: Clarify documentation on dependencies and keywords

Provide an example of using the -containers keyword and clarify
documentation on some of the dependency functions.

williamh/openrc,OpenRC/openrc,williamh/openrc,dwfreed/openrc,williamh/openrc,OpenRC/openrc,dwfreed/openrc,OpenRC/openrc,dwfreed/openrc