initial strings suppport in config file

src/,,config_custom.s

@@ -15,7 +15,7 @@
 
 ;; #CONFIG# PLATFORM_COMMODORE_64      YES
 ;; #CONFIG# BRAND_CUSTOM_BUILD         YES
-!macro CONFIG_CUSTOM_BRAND { !pet "custom build" }
+;; #CONFIG# CUSTOM_BRAND               "CUSTOM BUILD"
 
 
 ; --- Processor instruction set
@@ -94,25 +94,16 @@
 	!pet "l"
 }
 
-;; #CONFIG# KEYCMD_F1                  YES
-!macro CONFIG_KEYCMD_F1   { !pet "@" }
-;; #CONFIG# KEYCMD_F2                  NO
-; !macro CONFIG_KEYCMD_F2   { !pet "" }
-;; #CONFIG# KEYCMD_F3                  YES
-!macro CONFIG_KEYCMD_F3   { !pet "run:" }
-;; #CONFIG# KEYCMD_F4                  NO
-; !macro CONFIG_KEYCMD_F4   { !pet "" }
-;; #CONFIG# KEYCMD_F5                  YES
-!macro CONFIG_KEYCMD_F5   { !pet "load" }
+;; #CONFIG# KEYCMD_F1                  "@8$"
+;; #CONFIG# KEYCMD_F2                  "LOAD"
+;; #CONFIG# KEYCMD_F3                  "@9$"
+;; #CONFIG# KEYCMD_F4                  "RUN:"
+;; #CONFIG# KEYCMD_F5                  "@10$"
 ;; #CONFIG# KEYCMD_F6                  NO
-; !macro CONFIG_KEYCMD_F6   { !pet "" }
-;; #CONFIG# KEYCMD_F7                  YES
-!macro CONFIG_KEYCMD_F7   { !pet "@$" }
+;; #CONFIG# KEYCMD_F7                  "@11$"
 ;; #CONFIG# KEYCMD_F8                  NO
-; !macro CONFIG_KEYCMD_F8   { !pet "" }
 
-;; #CONFIG# KEYCMD_HELP                YES
-!macro CONFIG_KEYCMD_HELP { !pet "list" }
+;; #CONFIG# KEYCMD_HELP                "LIST"
 
 ;; #CONFIG# KEYCMD_F9                  NO
 ;; #CONFIG# KEYCMD_F10                 NO