eDonkey: improve/update classification

[IvanNardi]

eDonkey is definitely not as used as >10 years ago, but it seems it is still active.

While having a basic TCP support seems easy, identification over UDP doesn't work and it is hard to do it rightly (packets might be only 2 bytes long): remove it.

Credits to V.G [email protected]

[sonarqubecloud[bot]]

Quality Gate passed

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