[core] option: errorlog high precision timestamps

server.feature-flags += ("server.errorlog-high-precision" => "enable")

Note: if using syslog() for errorlog, modern syslog implementations are
      configured separately (by an admin) for high precision timestamps;
      server.feature-flags has no effect on syslog-generated timestamps

restructure some of log.c into smaller internal routines

keep a file-scoped global log_stderrh to write to STDERR_FILENO
so that an errh handle is always available for logging errors

fix missing space between timestamp and filename in errorlog output
(missing space in lighttpd 1.4.58 and lighttpd 1.4.59) (fixes #3105)
x-ref:
  "missing ( in log lines from mod_auth"
  https://redmine.lighttpd.net/issues/3105

1 files changed, 2 insertions, 1 deletions

diff --git a/src/log.h b/src/log.h
index 0a8bcc21..1a253fde 100644
--- a/src/log.h
+++ b/src/log.h
@@ -31,6 +31,7 @@ __attribute_format__((__printf__, 6, 7))
 void log_error_multiline(log_error_st *errh, const char *filename, unsigned int line, const char * restrict multiline, const size_t len, const char *fmt, ...);
 
 __attribute_cold__
-void log_set_global_errh (log_error_st *errh);
+__attribute_returns_nonnull__
+log_error_st * log_set_global_errh (log_error_st *errh, int ts_high_precision);
 
 #endif