A set of Git security-fix releases

Versions v2.43.7, v2.44.4, v2.45.4, v2.46.4, v2.47.3, v2.48.2, v2.49.1 andv2.50.1 of the Git source-code management system have been released."This is a set of coordinated security fix releases. Please update atyour earliest convenience". See the announcement for details;many of the vulnerabilities have to do with tricks buried in untrustedrepositories.