updatet license, added file api docs

configure

@@ -631,6 +631,7 @@ build_vendor
 build_cpu
 build
 CP
+SWAG
 DPKGSOURCE
 DBUILDPACKAGE
 HELM
@@ -3404,6 +3405,58 @@ fi
   test -n "$DPKGSOURCE" && break
 done
 
+for ac_prog in swag true
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_path_SWAG+y}
+then :
+  printf %s "(cached) " >&6
+else case e in #(
+  e) case $SWAG in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_SWAG="$SWAG" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_path_SWAG="$as_dir$ac_word$ac_exec_ext"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac ;;
+esac
+fi
+SWAG=$ac_cv_path_SWAG
+if test -n "$SWAG"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $SWAG" >&5
+printf "%s\n" "$SWAG" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+  test -n "$SWAG" && break
+done
+
+
 
 for ac_prog in gcp cp
 do