Build: do not override the system "cc", on Linux and OpenBSD
-rw-r--r-- 1020 .editorconfig
-rw-r--r-- 63 .exim-project-root
-rw-r--r-- 299 .gitattributes
drwxr-xr-x - .github
-rw-r--r-- 57 .gitignore
-rw-r--r-- 1916 .mailmap
-rw-r--r-- 2316 Readme.pod
-rw-r--r-- 1104 SECURITY.md
drwxr-xr-x - configs
drwxr-xr-x - doc
drwxr-xr-x - release-process
drwxr-xr-x - src
drwxr-xr-x - test