Release 1.2.6 (2023-04-14):
---------------------------
 * Build system update: avoid configure tests to appear failing because of
   recent compilers bailing out on prototypes in autoconf generated test code.
 * Updated fallback vsnprintf implementation to fix an overflow error that
   can occur in rare cases.
 * Added macros ESO_ENABLE_TSAN() and ESO_ENABLE_ASAN() to support building
   with sanitizer support.

Release 1.2.5 (2023-04-03):
---------------------------
 * Build system fixes and improvements.

Release 1.2.4 (2020-04-14):
---------------------------
 * Minor reference documentation fixes.

Release 1.2.3 (2019-02-18):
---------------------------
 * Build system updates.
 * eso.m4: removed definition of symbol 'strdup' from ESO_FUNC_STRDUP() if it
   is not found on the system. This makes the macro a pure test and the
   caller is responsible for acting on the result.
 * Cleanup of compiler warnings.

Release 1.2.2 (2017-11-21):
---------------------------
 * Reference documentation updates.
 * Build system updates.
 * Cleanup of compiler warnings in unit tests.

Release 1.2.1 (2015-07-20):
---------------------------
 * cx_deque, cxutils.c: Bug fixes.

Release 1.2 (2015-03-06):
-------------------------
 * cx_string: New functions added.
 * Minor documentation cleanup.  
