bug#34193: 26.1; make-network-proces :host 'local fails with ipv6

[Ernesto Alfonso]

    $ netstat -tlpn | grep 1959
    tcp6       0      0 ::1:1959                :::*                    LISTEN  
    1990/stumpwm        


    ELISP> (make-network-process :host 'local
                                 :service 1959
                                 :name "test")
    *** Eval error ***  make client process failed: Connection refused, :host, 
local, :service, 1959, :name, test
    ELISP> (make-network-process :host 'local
                                 :service 1959
                                 :name "test"
                                 :family 'ipv6)
    *** Eval error ***  127.0.0.1/1959 Address family for hostname not supported
    ELISP> (make-network-process :host "localhost"
                                 :service 1959
                                 :name "test")
    #<process test>
   
    



In GNU Emacs 26.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.11)
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Windowing system distributor 'The X.Org Foundation', version 11.0.11902000
System Description:     Debian GNU/Linux 9.6 (stretch)

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