replace use of strtok by renetrant strtok.  This module should now be completely thread-safe.
replace use of strtok by renetrant strtok. 
This module should now be completely thread-safe.


git-svn-id: fc35eccb03ccef1c432fd0fcf5295fcceaca86a6@23512 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6

opencog/link-grammar,opencog/link-grammar,ampli/link-grammar,linas/link-grammar,opencog/link-grammar,linas/link-grammar,linas/link-grammar,ampli/link-grammar,MadBomber/link-grammar,ampli/link-grammar,MadBomber/link-grammar,MadBomber/link-grammar,linas/link-grammar,MadBomber/link-grammar,linas/link-grammar,ampli/link-grammar,opencog/link-grammar,ampli/link-grammar,opencog/link-grammar,MadBomber/link-grammar,opencog/link-grammar,linas/link-grammar,opencog/link-grammar,ampli/link-grammar,opencog/link-grammar,opencog/link-grammar,MadBomber/link-grammar,linas/link-grammar,ampli/link-grammar,MadBomber/link-grammar,ampli/link-grammar,ampli/link-grammar,linas/link-grammar,linas/link-grammar,MadBomber/link-grammar