Source-code management system security updates

It turns out that even rather different source-code management systems canhave similar vulnerabilities. This can be seen in the Git v2.14.1,Mercurial 4.3, andSubversion 1.9.7 releases (plus updates ofolder releases). In each case, it's possible to provide a maliciousrepository URLthat ends up executing code; these URLs can be buried outof sight in existing repositories. Updating would be a good idea,regardless of which system you use.