-unimportant="filename with spaces" -unimportant=pattern -u=pattern -umportant-nowarn=pattern -umportant-query=pattern
Specify those files that need not be sucessfully created when applying a patch file. These will be the unimportant files who do not require existent source files for applying the whole patch file. You can modify the behaviour of the patch file with the suffixes to "-nowarn" and "-query". In the first case, DoPatch will not even issue a warning and simply continue to prepare applying the patch file if it can't build the file. In the later case it puts up a question (or dialog box) informing the user and asking wether to proceed or cancel applying the patch file.
Note that unlike with other patterns, "-u" is no shortcut for "-u=*" since making all files unimportant is strongly discouraged. If you want to work around this use "-u=*" that still matches all filenames.