busybox: add --uninstall option

Add an option to allow hard links to be removed.

   busybox --uninstall file

removes all hard links to the given file (including the file itself.)
Since Microsoft Windows refuses to delete a running executable a
BusyBox binary is unable to remove links to itself.

   busybox --uninstall -n file

displays the names of all hard links to the given file.

Although this feature is couched in terms of uninstalling BusyBox
it's actually quite general:  it can be used to delete or display
hard links to any file.

1 files changed, 1 insertions, 0 deletions

diff --git a/include/mingw.h b/include/mingw.h
index cef53a7c9..b712e4ec0 100644
--- a/include/mingw.h
+++ b/include/mingw.h
@@ -482,3 +482,4 @@ ULONGLONG CompatGetTickCount64(void);
 #define GetTickCount64 CompatGetTickCount64
 
 ssize_t get_random_bytes(void *buf, ssize_t count);
+int enumerate_links(const char *file, char *name);