Log Message:
libgit2: updated to 1.7.2

v1.7.2
------

What's Changed

This release fixes three bugs that can cause undefined behavior when given \ 
well-crafted inputs, either in input files or over network connections. These \ 
bugs may be able to be leveraged to cause denial of service attacks or \ 
unauthorized code execution.

Two of these issues were discovered and reported by security engineers at Amazon \ 
Web Services. We thank the AWS Security team for their efforts to identify these \ 
issues, provide helpful reproduction cases, and responsibly disclose their \ 
findings.

Security fixes

* transport: safely handle messages with no caps
* revparse: fix parsing bug for trailing `@`
* index: correct index has_dir_name check