I've attached some code which fixes the "stepping through a plt" problem 
listed in #5260. It identifies if the user has stepped into a .plt 
section in the program, and steps through the dynamic library linking 
code, landing the user back in their program.

I've included a test for it and ensured that it does not break any 
current tests; if nobody has any problems I'll commit it in a day or two.

Thanks!
- Mike