zlog: Upgrade 1.2.19 -> 1.2.20

Upgrade to release 1.2.20:

- Added zlog_fsync(), to flush the logs to disk on demand.
- Added zlog_is_init(), so a library can tell whether the program
  around it has already set zlog up.
- Added zlog_category_has_rules(), so a caller can tell a
  category the configuration covers from one it has never heard of.
- Added zlog_fini_try(), which gives up instead of waiting for
  the configuration lock. zlog_fini() from a signal handler that
  interrupted a thread inside zlog waits forever.
- A rotating rule keeps its file open between messages: two
  syscalls a line instead of four, and about 1.8x faster.
- An oversized message is formatted once instead of twice:
  "%.200m" of a 4MB message is about twice as fast, for identical
  output.
- A message longer than buffer max is truncated instead of being
  dropped.
- Every %E(NAME) in a format or a file path is replaced, not just
  the first one. Two of them used to fail zlog_init().
- The rotate lock file falls back to /tmp/zlog.lock when the
  configuration file is not writable, instead of failing every
  rotation silently. It is created 0644 rather than 0777, and a
  symbolic link in its place is refused.
- The pthread return values in the writer thread are checked in
  release builds too, not only where asserts are compiled in.
- hzlog prints the buffer length in front of the dump.
- Include guards no longer use identifiers reserved to the
  implementation; the public one is ZLOG_ZLOG_H.
- __DATE__ and __TIME__ are gone, so the build is reproducible.
- Fixed the install and test targets in the top level Makefile.
- zlog.spec is gone: CPack generates its own, and the
  distributions that package zlog use their own.
- Dead code removed from conf.c, level_list.c and thread.c, and
  the debug messages removed from CMakeLists.txt.
- The release procedure is written down in doc/developer.md and
  no longer names a version, the rotate lock file section of the
  users guide says what the code does, and CLAUDE.md is corrected
  and translated to English.
- Typos fixed throughout the tree.
- Tests added for zlog_init(NULL), the rotation lock file, buffer
  max truncation, %E() replacement, and the return values
  test_press_write2 used to ignore

Signed-off-by: Leon Anavi <leon.anavi@konsulko.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

meta-oe/recipes-extended/zlog/zlog_1.2.20.bb

@@ -4,7 +4,7 @@ LICENSE = "Apache-2.0"
 LIC_FILES_CHKSUM = "file://LICENSE;md5=86d3f3a95c324c9479bd8986968f4327"
 
 SRC_URI = "git://github.com/HardySimpson/zlog;branch=master;protocol=https;tag=${PV}"
-SRCREV = "728602097c5f07f860f7ca32baecb229d89a2637"
+SRCREV = "92b4ad0f60856ae92198d080327bd2c4ed10cd7d"
 
 inherit cmake