clean up event handler on disconnect
clean up event handler on disconnect

pravi/jsxc,diaspora/jsxc,pravi/jsxc,Zauberstuhl/jsxc,jsxc/jsxc,Zauberstuhl/jsxc,svbergerem/jsxc,pravi/jsxc,svbergerem/jsxc,jsxc/jsxc,Zauberstuhl/jsxc,jsxc/jsxc,svbergerem/jsxc,diaspora/jsxc,diaspora/jsxc