Added ability to create a chat with a prior specified threadID.
Added ability to create a chat with a prior specified threadID.

git-svn-id: 0d4d1bf2e47502aa0f0957c230a0ec7fa56198fd@6241 b35dd754-fafc-0310-a699-88a17e54d16e

vanitasvitae/Smack,vanitasvitae/Smack,vanitasvitae/smack-omemo,unisontech/Smack,igniterealtime/Smack,ishan1604/Smack,igniterealtime/Smack,lovely3x/Smack,ayne/Smack,cjpx00008/Smack,vito-c/Smack,magnetsystems/message-smack,andrey42/Smack,igorexax3mal/Smack,vanitasvitae/smack-omemo,hy9902/Smack,dpr-odoo/Smack,TTalkIM/Smack,andrey42/Smack,qingsong-xu/Smack,chuangWu/Smack,dpr-odoo/Smack,Tibo-lg/Smack,hy9902/Smack,ayne/Smack,unisontech/Smack,opg7371/Smack,andrey42/Smack,u20024804/Smack,cjpx00008/Smack,Flowdalic/Smack,unisontech/Smack,chuangWu/Smack,vito-c/Smack,hy9902/Smack,ishan1604/Smack,opg7371/Smack,opg7371/Smack,xuIcream/Smack,mar-v-in/Smack,Flowdalic/Smack,esl/Smack,mar-v-in/Smack,kkroid/OnechatSmack,qingsong-xu/Smack,annovanvliet/Smack,deeringc/Smack,qingsong-xu/Smack,ishan1604/Smack,igorexax3mal/Smack,magnetsystems/message-smack,dpr-odoo/Smack,lovely3x/Smack,igniterealtime/Smack,annovanvliet/Smack,kkroid/OnechatSmack,TTalkIM/Smack,Flowdalic/Smack,deeringc/Smack,esl/Smack,ayne/Smack,annovanvliet/Smack,vanitasvitae/Smack,Tibo-lg/Smack,cjpx00008/Smack,chuangWu/Smack,Tibo-lg/Smack,deeringc/Smack,xuIcream/Smack,xuIcream/Smack,igorexax3mal/Smack,kkroid/OnechatSmack,u20024804/Smack,mar-v-in/Smack,vanitasvitae/smack-omemo,magnetsystems/message-smack,lovely3x/Smack,TTalkIM/Smack,esl/Smack,u20024804/Smack