mmgr.h: remove everything if !defined(USE_MMGR); move dox to end of file
debug.h: fix stupid n00b bug in assert2 (expr wasn't in "()" )
This was SVN commit r1822.
- sysdep/debug.h includes platform-specific version, so they can define
debug_break
- no longer a debug_break wrapper that calls to specific versions (so
that the debugger breaks in the target function directly)
- unix-specific stuff is only debug ATM; call it udbg instead of unix.*
This was SVN commit r1813.