Document xdebug_break() behavior.
Document xdebug_break() behavior.

xdebug_break() is helpful when the debugger won't stop at a breakpoint.
The causes of this vary; for example some complex auto class loading may
be confusing xdebug. Using xdebug_break() is a last resort, but at least
it achieves the desired effect of breaking at a line of code when
nothing else works.

jerray/vdebug,AndBicScadMedia/vdebug,coffeine-009/vdebug,joonty/vdebug,sumyfly/vdebug,tjwallis/vim,sumyfly/vdebug,coffeine-009/vdebug,jerray/vdebug,paprykarz/vdebug,Taluu/vdebug,Taluu/vdebug,coffeine-009/vdebug,mispencer/vdebug,tjwallis/vim,Taluu/vdebug,tjwallis/vim,benjifisher/vdebug,paprykarz/vdebug,AndBicScadMedia/vdebug,joonty/vdebug,jerray/vdebug,tjwallis/vim,mispencer/vdebug,paprykarz/vdebug,sumyfly/vdebug,benjifisher/vdebug,benjifisher/vdebug,joonty/vdebug,AndBicScadMedia/vdebug,tjwallis/vim,mispencer/vdebug