Also grant directory permissions in sysnet_manage_config

On systemd, systemd-networkd keeps its configuration in
/etc/systemd/network, where both files and directories are labelled as
net_conf_t. When granting network configuration management permissions
also include directory management rights when systemd is in use.

This fixes denials from udev trying to parse systemd network
configuration.

Signed-off-by: Krzysztof Nowicki <krissn@op.pl>

policy/modules/system/sysnetwork.if

@@ -541,6 +541,10 @@ interface(`sysnet_manage_config',`
 	ifdef(`distro_redhat',`
 		manage_files_pattern($1, net_conf_t, net_conf_t)
 	')
+
+	ifdef(`init_systemd',`
+		manage_files_pattern($1, net_conf_t, net_conf_t)
+	')
 ')
 
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