merge(third_party/git): Merge squashed git subtree at v2.23.0

Merge commit '1b593e1ea4' as 'third_party/git'
2020-01-11 23:36:56 +00:00 · 2020-01-11 23:36:56 +00:00 · 7ef0d62730
commit 7ef0d62730
parent 6a2a300707 1b593e1ea4
3629 changed files with 1139935 additions and 0 deletions
--- a/third_party/git/contrib/coccinelle/xstrdup_or_null.cocci
+++ b/third_party/git/contrib/coccinelle/xstrdup_or_null.cocci
@ -0,0 +1,13 @@
+@@
+expression E;
+expression V;
+@@
+- if (E)
+-    V = xstrdup(E);
+ V = xstrdup_or_null(E);
+
+@@
+expression E;
+@@
+- xstrdup(absolute_path(E))
+ absolute_pathdup(E)