Zabbix

...G...... [ZBX-16998] improved agent binary compatibility by removing __thread attribute when not building agent2

* commit '7f7970126f09818d4567acd2d7a91ec7a0b71106':
  .D........ [ZBX-16998] added changelog entry
  .......... [ZBX-16998] fixed agent2 build on windows
  ...G...... [ZBX-16998] removed __thread usage when building only C targets

(cherry picked from commit 75ea8679f05b892a9d09c6ba5fe3ecb9b47e332f)