pagekite: avoid redundant information in syslog

Patch from upstream: 7b45878185

Signed-off-by: Karl Palsson <karlp@tweak.net.au>

net/pagekitec/patches/01-Omit-redundant-times-when-logging-to-syslog.patch

@@ -0,0 +1,44 @@
+From 7b4587818564aa667f868249e9a8f1dc1d095fd3 Mon Sep 17 00:00:00 2001
+From: "Bjarni R. Einarsson" <bre@klaki.net>
+Date: Tue, 25 Feb 2020 16:10:11 +0000
+Subject: [PATCH] Omit redundant times when logging to syslog
+
+---
+ libpagekite/pklogging.c | 19 ++++++++++++++-----
+ 1 file changed, 14 insertions(+), 5 deletions(-)
+
+diff --git a/libpagekite/pklogging.c b/libpagekite/pklogging.c
+index cf353f8..6129c30 100644
+--- a/libpagekite/pklogging.c
++++ b/libpagekite/pklogging.c
+@@ -55,16 +55,25 @@ int pk_log(int level, const char* fmt, ...)
+ #else
+     struct timeval t;
+     char tsbuf[30];
++# ifdef HAVE_DS_LOG_FORMAT
+     gettimeofday(&t, NULL);
+     strftime(tsbuf, sizeof(tsbuf), "%Y-%m-%d %H:%M:%S", localtime(&t.tv_sec));
+-# ifdef HAVE_DS_LOG_FORMAT
+     len = snprintf(output, 4000, "[%s.%03d][%x] ",
+                            tsbuf, (int)t.tv_usec / 1000, (int) pthread_self());
+ # else
+-    len = sprintf(output, "t=%s.%03d; ts=%x; tid=%x; ll=%x; msg=",
+-                          tsbuf, (int)t.tv_usec / 1000,
+-                          (int) time(0), (int) pthread_self(),
+-                          logged_lines++);
++    if (log_file != NULL) {
++      gettimeofday(&t, NULL);
++      strftime(tsbuf, sizeof(tsbuf), "%Y-%m-%d %H:%M:%S", localtime(&t.tv_sec));
++      len = sprintf(output, "t=%s.%03d; ts=%x; tid=%x; ll=%x; msg=",
++                            tsbuf, (int)t.tv_usec / 1000,
++                            (int) time(0), (int) pthread_self(),
++                            logged_lines++);
++    }
++    else {
++      /* For syslog, we omit the times, syslog handles that. */
++      len = sprintf(output, "tid=%x; ll=%x; msg=",
++                            (int) pthread_self(), logged_lines++);
++    }
+ # endif
+ #endif
+     va_start(args, fmt);