trustee: share trustee header path formatting

Move the shared GRANT/REMOVE/REVOKE header path formatting into trustee.c.

The Novell trustee tools display the server and volume separator as
SERVER/SYS: while keeping the remaining path separators as DOS backslashes.
Use one trustee_header_path() helper for that formatting instead of keeping
separate local copies in GRANT, REMOVE and REVOKE.

No behavior change.

trustee.c

@@ -31,6 +31,35 @@
 #define S_IFDIR 0040000
 #endif
 
+
+/*
+ * trustee_header_path
+ *
+ * Purpose:
+ *   Formats the path header used by GRANT, REMOVE and REVOKE.
+ *
+ * Parameters:
+ *   out  - destination buffer.
+ *   path - source path to format.
+ *   max  - destination buffer size.
+ *
+ * Notes:
+ *   Novell trustee tools display the server and volume separator as
+ *   SERVER/SYS: while tools such as RIGHTS keep SERVER\SYS:. Keep all
+ *   remaining path separators as DOS backslashes.
+ */
+void trustee_header_path(char *out, char *path, int max)
+{
+  char *p;
+  char *colon;
+
+  tool_header_path(out, path, max);
+
+  p = strchr(out, '\\');
+  colon = strchr(out, ':');
+  if (p && colon && p < colon)
+    *p = '/';
+}
 /*
  * trustee_parse_right_word
  *