NetworkTools: code cleanup; header cleanup;

git-svn-id: svn://svn.code.sf.net/p/processhacker/code@5401 21ef857c-d57f-4fe0-8362-d861dc6d29cd
NetworkTools: fixed ping loss

git-svn-id: svn://svn.code.sf.net/p/processhacker/code@5402 21ef857c-d57f-4fe0-8362-d861dc6d29cd
NetworkTools: fixed ping loss

git-svn-id: svn://svn.code.sf.net/p/processhacker/code@5403 21ef857c-d57f-4fe0-8362-d861dc6d29cd