Fix NullPointerException when start URL was not found when ascan with API
Fix NullPointerException when start URL was not found when ascan with API

Change SessionStructure.find(long, URI, String, String) to return null
when the node is not found, which allows client code to react to missing
URL.

jorik041/zaproxy,kingthorin/zaproxy,pdehaan/zaproxy,zapbot/zaproxy,lightsey/zaproxy,gmaran23/zaproxy,cassiodeveloper/zaproxy,veggiespam/zaproxy,thamizarasu/zaproxy,MD14/zaproxy,psiinon/zaproxy,veggiespam/zaproxy,mario-areias/zaproxy,0xkasun/zaproxy,robocoder/zaproxy,gmaran23/zaproxy,thc202/zaproxy,lightsey/zaproxy,tjackiw/zaproxy,gsavastano/zaproxy,zaproxy/zaproxy,robocoder/zaproxy,surikato/zaproxy,kingthorin/zaproxy,zaproxy/zaproxy,JordanGS/zaproxy,cassiodeveloper/zaproxy,rajiv65/zaproxy,MD14/zaproxy,kingthorin/zaproxy,DJMIN/zaproxy,efdutra/zaproxy,efdutra/zaproxy,zapbot/zaproxy,rajiv65/zaproxy,mario-areias/zaproxy,DJMIN/zaproxy,psiinon/zaproxy,mustafa421/zaproxy,surikato/zaproxy,meitar/zaproxy,NVolcz/zaproxy,robocoder/zaproxy,NVolcz/zaproxy,meitar/zaproxy,veggiespam/zaproxy,mario-areias/zaproxy,mario-areias/zaproxy,0xkasun/zaproxy,zaproxy/zaproxy,JordanGS/zaproxy,cassiodeveloper/zaproxy,mustafa421/zaproxy,Harinus/zaproxy,0xkasun/zaproxy,ozzyjohnson/zaproxy,ozzyjohnson/zaproxy,thamizarasu/zaproxy,Ye-Yong-Chi/zaproxy,surikato/zaproxy,ozzyjohnson/zaproxy,cassiodeveloper/zaproxy,zaproxy/zaproxy,mabdi/zaproxy,urgupluoglu/zaproxy,0xkasun/zaproxy,veggiespam/zaproxy,surikato/zaproxy,zapbot/zaproxy,robocoder/zaproxy,robocoder/zaproxy,profjrr/zaproxy,Harinus/zaproxy,mabdi/zaproxy,profjrr/zaproxy,ozzyjohnson/zaproxy,rajiv65/zaproxy,NVolcz/zaproxy,kingthorin/zaproxy,gmaran23/zaproxy,thc202/zaproxy,surikato/zaproxy,lightsey/zaproxy,JordanGS/zaproxy,rajiv65/zaproxy,veggiespam/zaproxy,lightsey/zaproxy,mabdi/zaproxy,jorik041/zaproxy,mabdi/zaproxy,rajiv65/zaproxy,profjrr/zaproxy,lightsey/zaproxy,surikato/zaproxy,profjrr/zaproxy,DJMIN/zaproxy,efdutra/zaproxy,lightsey/zaproxy,0xkasun/zaproxy,thamizarasu/zaproxy,pdehaan/zaproxy,psiinon/zaproxy,JordanGS/zaproxy,JordanGS/zaproxy,zapbot/zaproxy,lightsey/zaproxy,rajiv65/zaproxy,DJMIN/zaproxy,jorik041/zaproxy,cassiodeveloper/zaproxy,NVolcz/zaproxy,Harinus/zaproxy,gsavastano/zaproxy,gsavastano/zaproxy,zapbot/zaproxy,UjuE/zaproxy,Ali-Razmjoo/zaproxy,UjuE/zaproxy,zaproxy/zaproxy,Ye-Yong-Chi/zaproxy,meitar/zaproxy,Harinus/zaproxy,pdehaan/zaproxy,Ali-Razmjoo/zaproxy,kingthorin/zaproxy,UjuE/zaproxy,tjackiw/zaproxy,MD14/zaproxy,meitar/zaproxy,gsavastano/zaproxy,profjrr/zaproxy,efdutra/zaproxy,thc202/zaproxy,kingthorin/zaproxy,tjackiw/zaproxy,Ye-Yong-Chi/zaproxy,tjackiw/zaproxy,mustafa421/zaproxy,Ye-Yong-Chi/zaproxy,meitar/zaproxy,psiinon/zaproxy,ozzyjohnson/zaproxy,mustafa421/zaproxy,surikato/zaproxy,JordanGS/zaproxy,DJMIN/zaproxy,Ye-Yong-Chi/zaproxy,UjuE/zaproxy,cassiodeveloper/zaproxy,ozzyjohnson/zaproxy,urgupluoglu/zaproxy,jorik041/zaproxy,pdehaan/zaproxy,Ye-Yong-Chi/zaproxy,jorik041/zaproxy,veggiespam/zaproxy,mustafa421/zaproxy,zapbot/zaproxy,urgupluoglu/zaproxy,NVolcz/zaproxy,MD14/zaproxy,mabdi/zaproxy,gsavastano/zaproxy,jorik041/zaproxy,zaproxy/zaproxy,jorik041/zaproxy,JordanGS/zaproxy,meitar/zaproxy,Ali-Razmjoo/zaproxy,thamizarasu/zaproxy,0xkasun/zaproxy,UjuE/zaproxy,meitar/zaproxy,gmaran23/zaproxy,tjackiw/zaproxy,robocoder/zaproxy,gmaran23/zaproxy,urgupluoglu/zaproxy,tjackiw/zaproxy,gmaran23/zaproxy,kingthorin/zaproxy,NVolcz/zaproxy,DJMIN/zaproxy,gsavastano/zaproxy,UjuE/zaproxy,mario-areias/zaproxy,Ali-Razmjoo/zaproxy,Ali-Razmjoo/zaproxy,urgupluoglu/zaproxy,thamizarasu/zaproxy,meitar/zaproxy,thamizarasu/zaproxy,Ali-Razmjoo/zaproxy,gmaran23/zaproxy,mabdi/zaproxy,mario-areias/zaproxy,profjrr/zaproxy,UjuE/zaproxy,Harinus/zaproxy,zapbot/zaproxy,mabdi/zaproxy,MD14/zaproxy,efdutra/zaproxy,Ali-Razmjoo/zaproxy,thc202/zaproxy,cassiodeveloper/zaproxy,efdutra/zaproxy,pdehaan/zaproxy,thc202/zaproxy,thc202/zaproxy,zaproxy/zaproxy,NVolcz/zaproxy,Harinus/zaproxy,MD14/zaproxy,veggiespam/zaproxy,MD14/zaproxy,DJMIN/zaproxy,profjrr/zaproxy,robocoder/zaproxy,Ye-Yong-Chi/zaproxy,mustafa421/zaproxy,mustafa421/zaproxy,psiinon/zaproxy,efdutra/zaproxy,urgupluoglu/zaproxy,mario-areias/zaproxy,pdehaan/zaproxy,pdehaan/zaproxy,thc202/zaproxy,Harinus/zaproxy,thamizarasu/zaproxy,tjackiw/zaproxy,ozzyjohnson/zaproxy,psiinon/zaproxy,psiinon/zaproxy,urgupluoglu/zaproxy,rajiv65/zaproxy,gsavastano/zaproxy,0xkasun/zaproxy