Preprocessor: allow “mfs” as a variable name

(manually cherry picked from commit 702cf507)

Preprocessor: allow “mfs” as a variable name
ae8851ca · Sébastien Villemot · d8f31e0d · 64e3be5a · 20acdbc1 · 64e3be5a
Verified Commit ae8851ca authored 1 year ago by Sébastien Villemot
--- a/preprocessor @ 64e3be5a
+++ b/preprocessor @ 64e3be5a
-Subproject commit 20acdbc119648f8ae6438e7f3a18943b4c23e7d2
+Subproject commit 64e3be5aca18e69089c72b842e685b53f183913b