Revamp the auto-layout of PuTTY configuration box controls. They are

Revamp the auto-layout of PuTTY configuration box controls. They are
now auto-laid-out at runtime instead of compile time. Byebye
win_res.inp and mkres.c; byebye most of win_res.rc; hello a whole
new load of control-creation functions in windlg.c. Also, now that
we're creating the tab control at runtime, we can check to see if it
succeeded and use an alternative if so. This _should_ enable the
config box to work on Win32s, although at the time of checkin that's
untested.

[originally from svn r673]