MakeProxy: Detect need for nested proxy based on having sub-branches rather than just the branch name ending in a period.
MakeProxy: Detect need for nested proxy based on having sub-branches rather than just the branch name ending in a period.

This problem was reported in ROOT-8585

gganis/root,gganis/root,gganis/root,gganis/root,gganis/root,gganis/root,gganis/root,gganis/root,gganis/root,gganis/root,gganis/root