spec: remove nsswitch.conf scriptlet

Related to: https://fedoraproject.org/wiki/Changes/Make_Authselect_Mandatory

mdns is now supported in authselect. Users are now expected to use authselect
to configure the system and packages should no longer support non-authselect
configurations.

Resolves: rhbz#2023745

nss-mdns.spec

@@ -1,6 +1,6 @@
 Name: nss-mdns
 Version: 0.15.1
-Release: 2%{?dist}
+Release: 3%{?dist}
 Summary: glibc plugin for .local name resolution
 
 License: LGPLv2+
@@ -42,51 +42,10 @@ rm -rf $RPM_BUILD_ROOT
 %{?ldconfig}
 
 %posttrans
-function mod_nss() {
+authselect enable-feature with-mdns4 &> /dev/null || :
-    if [ -f "$1" ] ; then
-        # sed-fu to add mdns4_minimal to the hosts line of /etc/nsswitch.conf
-        sed -i.bak '
-            /^hosts:/ !b
-            /\<mdns\(4\|6\)\?\(_minimal\)\?\>/ b
-            s/\<\(files\( myhostname\)\?[[:blank:]]\+\)/\1mdns4_minimal [NOTFOUND=return] /g
-            ' "$1"
-    fi
-}
-
-FILE="$(readlink /etc/nsswitch.conf || echo /etc/nsswitch.conf)"
-if [ "$FILE" = "/etc/authselect/nsswitch.conf" ] && authselect check &>/dev/null; then
-    mod_nss "/etc/authselect/user-nsswitch.conf"
-    authselect apply-changes &> /dev/null || :
-else
-    mod_nss "$FILE"
-    # also apply the same changes to user-nsswitch.conf to affect
-    # possible future authselect configuration
-    mod_nss "/etc/authselect/user-nsswitch.conf"
-fi
 
 %preun
-function mod_nss() {
+authselect disable-feature with-mdns4 &> /dev/null || :
-    if [ -f "$1" ] ; then
-        # sed-fu to remove mdns4_minimal from the hosts line of /etc/nsswitch.conf
-    	sed -i.bak '
-	    	/^hosts:/ !b
-		    s/[[:blank:]]\+mdns\(4\|6\)\?\(_minimal\( \[NOTFOUND=return\]\)\?\)\?//g
-    		' "$1"
-    fi
-}
-
-if [ "$1" -eq 0 ] ; then
-    FILE="$(readlink /etc/nsswitch.conf || echo /etc/nsswitch.conf)"
-    if [ "$FILE" = "/etc/authselect/nsswitch.conf" ] && authselect check &>/dev/null; then
-        mod_nss "/etc/authselect/user-nsswitch.conf"
-        authselect apply-changes &> /dev/null || :
-    else
-        mod_nss "$FILE"
-        # also apply the same changes to user-nsswitch.conf to affect
-        # possible future authselect configuration
-        mod_nss "/etc/authselect/user-nsswitch.conf"
-    fi
-fi
 
 %ldconfig_postun
 
@@ -98,6 +57,9 @@ fi
 
 
 %changelog
+* Tue Nov 16 2021 Pavel Březina - 0.15.1-3
+- Rely only on authselect for nsswitch.conf changes (#2023745)
+
 * Thu Jul 22 2021 Fedora Release Engineering <releng@fedoraproject.org> - 0.15.1-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild