[Issue 23855] traits getOverloads returns overload when one of the symbols is a templatized function

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23855

--- Comment #2 from FeepingCreature <default_357-line at yahoo.de> ---
Far as I can tell, `__traits(getOverloads)` just doesn't get rid of the
overloadness of the template or function correctly. `td.funcroot` is set,
`fd.overnext` is set, but `__traits(getOverloads)` only zeroes `td.overnext`.

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