Implemented keep-alives.
Implemented keep-alives.


git-svn-id: 0d4d1bf2e47502aa0f0957c230a0ec7fa56198fd@2219 b35dd754-fafc-0310-a699-88a17e54d16e

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