Fix typo in dns_name_copy-with-result.spatch

A typo introduced in f3f1cab0 prevents
execution of the dns_name_copy-with-result.spatch. The replacement
should end with semicolon not a colon:

    plus: parse error:
      File "cocci/dns_name_copy-with-result.spatch", line 28, column 23, charpos = 421
      around = ':',
      whole content = + dns_name_copy(E1, E2):
69 jobs for !5549 with mnowak/fix-typo-in-dns_name_copy-with-result.spatch in 4 minutes and 2 seconds (queued for 16 seconds)
latest detached
Status Job ID Name Coverage
  Autoconf
passed autoreconf #2083070
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00:00:18

canceled autoreconf #2083003
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  Precheck
canceled clang-format #2083005
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passed coccinelle #2083079
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canceled danger #2083007
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canceled misc #2083004
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canceled tarball-create #2083008
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canceled coccinelle #2083006
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  Build
canceled clang:asan #2083022
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canceled clang:buster:amd64 #2083025
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canceled clang:freebsd12:amd64 #2083026
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canceled clang:freebsd13:amd64 #2083027
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canceled clang:openbsd:amd64 #2083028
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canceled clang:tsan #2083024
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canceled gcc:alpine3.14:amd64 #2083009
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canceled gcc:asan #2083021
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canceled gcc:bionic:amd64 #2083019
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canceled gcc:bullseye:amd64 #2083013
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canceled gcc:buster:amd64 #2083012
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canceled gcc:buster:amd64cross32 #2083014
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canceled gcc:focal:amd64 #2083020
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canceled gcc:oraclelinux7:amd64 #2083010
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canceled gcc:oraclelinux8:amd64 #2083011
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canceled gcc:out-of-tree #2083016
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canceled gcc:sid:amd64 #2083015
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canceled gcc:tarball #2083017
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canceled gcc:tsan #2083023
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canceled gcc:tumbleweed:amd64 #2083018
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  Unit
canceled unit:clang:asan #2083040
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canceled unit:clang:buster:amd64 #2083043
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canceled unit:clang:freebsd12:amd64 #2083044
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canceled unit:clang:freebsd13:amd64 #2083045
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canceled unit:clang:openbsd:amd64 #2083046
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canceled unit:clang:tsan #2083042
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canceled unit:gcc:alpine3.14:amd64 #2083029
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canceled unit:gcc:asan #2083039
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canceled unit:gcc:bionic:amd64 #2083037
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canceled unit:gcc:bullseye:amd64 #2083033
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canceled unit:gcc:buster:amd64 #2083032
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canceled unit:gcc:buster:amd64cross32 #2083034
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canceled unit:gcc:focal:amd64 #2083038
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canceled unit:gcc:oraclelinux7:amd64 #2083030
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canceled unit:gcc:oraclelinux8:amd64 #2083031
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canceled unit:gcc:sid:amd64 #2083035
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canceled unit:gcc:tsan #2083041
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canceled unit:gcc:tumbleweed:amd64 #2083036
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  System
canceled system:clang:asan #2083058
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canceled system:clang:buster:amd64 #2083061
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canceled system:clang:freebsd12:amd64 #2083062
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canceled system:clang:freebsd13:amd64 #2083063
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canceled system:clang:tsan #2083060
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canceled system:gcc:alpine3.14:amd64 #2083047
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canceled system:gcc:asan #2083057
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canceled system:gcc:bionic:amd64 #2083055
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canceled system:gcc:bullseye:amd64 #2083051
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canceled system:gcc:buster:amd64 #2083050
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canceled system:gcc:buster:amd64cross32 #2083052
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canceled system:gcc:focal:amd64 #2083056
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canceled system:gcc:oraclelinux7:amd64 #2083048
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canceled system:gcc:oraclelinux8:amd64 #2083049
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canceled system:gcc:sid:amd64 #2083053
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canceled system:gcc:tsan #2083059
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canceled system:gcc:tumbleweed:amd64 #2083054
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  Docs
canceled docs #2083064
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  Postcheck
canceled cppcheck #2083068
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canceled flake8 #2083065
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canceled gcov #2083069
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canceled pylint #2083066
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canceled scan-build #2083067
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