[3.12] gh-128916: Do not set SO_REUSEPORT on non-AF_INET* sockets (GH-128933)
          #128970
        
          
      
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socketserver.Unix*Servermay attempt to setSO_REUSEPORTon Unix sockets, causingEOPNOTSUPP, e.g. intest_asyncio#128916: Do not setSO_REUSEPORTon non-AF_INET*socketsDo not attempt to set
SO_REUSEPORTon sockets of address familifies otherthan
AF_INETandAF_INET6, as it is meaningless with these addressfamilies, and the call with fail with Linux kernel 6.12.9 and newer.
Co-authored-by: Vinay Sajip [email protected]
(cherry picked from commit 3829104)
Co-authored-by: Michał Górny [email protected]
Co-authored-by: Vinay Sajip [email protected]