(try_connect_guard): New static variable.
(syslogd_inited): Ditto.
(syslogd_sock): Ditto.
(try_connect_syslogd): New function to connect and write syslog to
local syslogd.
(vsyslog): Log to stderr if LOG_PERROR flag has been given to openlog.
Try logging to syslogd. Use Event Log resp. log file as fallback.
(closelog): Close socket to syslogd.
* include/sys/syslog.h (_PATH_LOG): Define.
(INTERNAL_NOPRI): Define if SYSLOG_NAMES is defined.
(INTERNAL_MARK): Ditto.
(struct _code): Ditto.
(prioritynames): Ditto.
(facilitynames): Ditto.