Pull out change to strdup_and_subst_obj which allowed escaped backslashes. These can be added via xml escapes, and the change significantly changes how ordinary labels are used.
Pull out change to strdup_and_subst_obj which allowed escaped backslashes.
These can be added via xml escapes, and the change significantly changes
how ordinary labels are used.

tkelman/graphviz,ellson/graphviz,BMJHayward/graphviz,BMJHayward/graphviz,MjAbuz/graphviz,MjAbuz/graphviz,MjAbuz/graphviz,kbrock/graphviz,BMJHayward/graphviz,MjAbuz/graphviz,pixelglow/graphviz,kbrock/graphviz,MjAbuz/graphviz,ellson/graphviz,pixelglow/graphviz,ellson/graphviz,BMJHayward/graphviz,BMJHayward/graphviz,kbrock/graphviz,pixelglow/graphviz,kbrock/graphviz,kbrock/graphviz,jho1965us/graphviz,BMJHayward/graphviz,tkelman/graphviz,jho1965us/graphviz,jho1965us/graphviz,tkelman/graphviz,tkelman/graphviz,pixelglow/graphviz,kbrock/graphviz,jho1965us/graphviz,ellson/graphviz,kbrock/graphviz,ellson/graphviz,MjAbuz/graphviz,pixelglow/graphviz,tkelman/graphviz,kbrock/graphviz,ellson/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,pixelglow/graphviz,ellson/graphviz,MjAbuz/graphviz,MjAbuz/graphviz,MjAbuz/graphviz,kbrock/graphviz,ellson/graphviz,tkelman/graphviz,jho1965us/graphviz,ellson/graphviz,ellson/graphviz,pixelglow/graphviz,pixelglow/graphviz,jho1965us/graphviz,tkelman/graphviz,BMJHayward/graphviz,BMJHayward/graphviz,kbrock/graphviz,tkelman/graphviz,kbrock/graphviz,pixelglow/graphviz,jho1965us/graphviz,tkelman/graphviz,jho1965us/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,jho1965us/graphviz,jho1965us/graphviz,ellson/graphviz,pixelglow/graphviz,BMJHayward/graphviz,jho1965us/graphviz,tkelman/graphviz,pixelglow/graphviz,tkelman/graphviz