Add a Git .mailmap file

This adds a Git .mailmap to unify spellings of committer names.

Discussion: https://postgr.es/m/76773029-A7AD-4BAF-AFC2-E511D26E866D@yesql.se

diff --git a/.mailmap b/.mailmap
new file mode 100644 (file)index 0000000..22d95d3
--- /dev/null
+++ b/.mailmap
@@ -0,0 +1 @@
+Álvaro Herrera <[email protected]>