brew.sh: don't restrict dev-cmd/*.sh to Homebrew developers.

Library/Homebrew/brew.sh

@@ -194,18 +194,23 @@ esac
 if [[ -z "$HOMEBREW_DEVELOPER" ]]
 then
   export HOMEBREW_GIT_CONFIG_FILE="$HOMEBREW_REPOSITORY/.git/config"
-  HOMEBREW_GIT_CONFIG_DEVELOPERMODE="$(git config --file="$HOMEBREW_GIT_CONFIG_FILE" --get homebrew.developermode)"
+  HOMEBREW_GIT_CONFIG_DEVELOPERMODE="$(git config --file="$HOMEBREW_GIT_CONFIG_FILE" --get homebrew.devcmdrun)"
   if [[ "$HOMEBREW_GIT_CONFIG_DEVELOPERMODE" = "true" ]]
   then
-    export HOMEBREW_DEVELOPER="1"
+    export HOMEBREW_DEV_CMD_RUN="1"
   fi
 fi
 
 if [[ -f "$HOMEBREW_LIBRARY/Homebrew/cmd/$HOMEBREW_COMMAND.sh" ]]
 then
   HOMEBREW_BASH_COMMAND="$HOMEBREW_LIBRARY/Homebrew/cmd/$HOMEBREW_COMMAND.sh"
-elif [[ -n "$HOMEBREW_DEVELOPER" && -f "$HOMEBREW_LIBRARY/Homebrew/dev-cmd/$HOMEBREW_COMMAND.sh" ]]
+elif [[ -f "$HOMEBREW_LIBRARY/Homebrew/dev-cmd/$HOMEBREW_COMMAND.sh" ]]
 then
+  if [[ -z "$HOMEBREW_DEVELOPER" ]]
+  then
+    git config --file="$HOMEBREW_GIT_CONFIG_FILE" --replace-all homebrew.devcmdrun true
+    export HOMEBREW_DEV_CMD_RUN="1"
+  fi
   HOMEBREW_BASH_COMMAND="$HOMEBREW_LIBRARY/Homebrew/dev-cmd/$HOMEBREW_COMMAND.sh"
 fi