* fhandler_process.cc (struct dos_drive_mappings): Use malloc/free
rather than cmalloc/cfree. Check return value from malloc before
using it.
(struct heap_info): Ditto.
(struct thread_info): Ditto. Rename from stack_info. Rename members
and local variables accordingly.
(thread_info::thread_info): Store stack and TEB addresses.
(thread_info::fill_if_match): Print "teb" if a TEB address has been
found. Special case for WOW64, explain why.
(format_process_maps): Fetch PEB address. Print MEM_RESERVE regions
with equal signs to distinguish them from PAGE_NOACCESS regions. Fix
printing of 'p' and 's' to differ between MEM_PRIVATE and MEM_MAPPED
pages, as on Linux. Print 'g' instead of 'p for PAGE_GUARD pages.
Print PEB and SharedUserData area if recognized.