• For executables search for matching (B) global uninitialized BSS symbols from linked libraries. Only do this for BSS symbols that have a size which avoids __bss_start. Without this some libraries would be considered unneeded even though they were providing a B symbol.
• Add in the symbols from crt1.o to cover a handful of common unresolved symbols.
• Consider (C) common data symbols as provided by libraries/crt1.
• Move libkey() function to more appropriate place.

Sponsored by: EMC / Isilon Storage Division