Simplified the function-finding regex, and made it more versatile

(so we don't need to keep adding variable-type strings).

mkproto.awk

@@ -54,15 +54,14 @@ BEGIN {
   printf "int %s(void);\n", a[2]
 }
 
-/^static|^extern/ || !/^[a-zA-Z]/ || /[;]/ {
+/^static|^extern/ || /[;]/ {
   next;
 }
 
-!/^OFF_T|^size_t|^off_t|^pid_t|^unsigned|^mode_t|^DIR|^user|^int|^char|^uint|^uchar|^short|^struct|^BOOL|^void|^time|^const|^RETSIGTYPE/ {
+!/^[A-Za-z][A-Za-z0-9_]* / {
   next;
 }
 
-
 /[(].*[)][ \t]*$/ {
     printf "%s;\n",$0;
     next;
@@ -73,4 +72,3 @@ BEGIN {
   printf "%s\n",$0;
   next;
 }
-