defining empty defaults for syslog_ log targets for common (Thanks @chtheis, partial fix to #682)

config/paths-common.conf

@@ -7,12 +7,17 @@ after  = paths-overrides.local
 
 [DEFAULT]
 
-
-
 sshd_log = %(syslog_authpriv)s
 
 dropbear_log = %(syslog_authpriv)s
 
+# There is no sensible generic defaults for syslog log targets, thus
+# leaving them empty here so that no errors while parsing/interpollatin configs
+syslog_daemon =
+syslog_ftp =
+syslog_local0 =
+syslog_mail_warn =
+syslog_user =
 
 # from /etc/audit/auditd.conf
 auditd_log = /var/log/audit/audit.log