converted RMDir back from SHFileOperation to the good old manual method

- RMDir can now be used with both /r and /REBOOTOK
- RMDir /r no longer leaves lots of files behind if one file removal failed
- The plug-ins directory is now always deleted, if not immediately, then after reboot
- RMDir /r prints a detailed log of its actions


git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@3597 212acab6-be3b-0410-9dea-997c60f758d6

Source/exehead/fileform.h

@@ -432,6 +432,11 @@ typedef struct {
   int flags;
 } ctlcolors;
 
+// constants for myDelete (util.c)
+#define DEL_DIR 1
+#define DEL_RECURSE 2
+#define DEL_REBOOT 4
+
 // $0..$9, $INSTDIR, etc are encoded as ASCII bytes starting from this value.
 // Added by ramon 3 jun 2003
 #define NS_SKIP_CODE 252