Allow "--in-place" as an alternative option name for "--inplace"

[@lbutlr]

On Jun 26, 2019, at 2:53 PM, Jan-Benedict Glaw via rsync <rsync at lists.samba.org> wrote:
> 
> As I commonly spell --inplace as --in-place, I'd like to suggest this simple patch:

If we’re going to do that add --remove-source and --delete-source as aliases for whatever the command is I have to look up every single time.

I mean, really, delete-source is the OBVIOUS flag as it matches with many other flags...

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