* app_hooks: add display_error; can be used by atlas to override our
dialog box
* lots of small fixes (mostly pertaining to headers)
* debug: clean up display_error, protect from reentrancy, fix a few edge
cases (e.g. error message from dtor -> exit pressed -> suppress all
subsequent errors)
* delay_load: add warning: NLSO ctors are unreliable since we're
compiling into static lib
This was SVN commit r4009.