Update CQL doc for CASSANDRA-6839 (non equal conditions in LWT)
Update CQL doc for CASSANDRA-6839 (non equal conditions in LWT)

patch by slebresne; reviewed by blerer for CASSANDRA-10752

clohfink/cassandra,mshuler/cassandra,mshuler/cassandra,thelastpickle/cassandra,Jaumo/cassandra,bcoverston/cassandra,ifesdjeen/cassandra,snazy/cassandra,sharvanath/cassandra,ptnapoleon/cassandra,kgreav/cassandra,DikangGu/cassandra,cooldoger/cassandra,apache/cassandra,aureagle/cassandra,jeffjirsa/cassandra,weideng1/cassandra,beobal/cassandra,juiceblender/cassandra,jrwest/cassandra,ifesdjeen/cassandra,carlyeks/cassandra,driftx/cassandra,josh-mckenzie/cassandra,Instagram/cassandra,jrwest/cassandra,bcoverston/cassandra,ifesdjeen/cassandra,belliottsmith/cassandra,strapdata/cassandra,tjake/cassandra,jeffjirsa/cassandra,juiceblender/cassandra,juiceblender/cassandra,jeffjirsa/cassandra,jasonwee/cassandra,Jollyplum/cassandra,jasonwee/cassandra,jasobrown/cassandra,hhorii/cassandra,thobbs/cassandra,mambocab/cassandra,adelapena/cassandra,WorksApplications/cassandra,blerer/cassandra,Instagram/cassandra,cooldoger/cassandra,adejanovski/cassandra,tjake/cassandra,jasobrown/cassandra,blerer/cassandra,jasonstack/cassandra,michaelsembwever/cassandra,ollie314/cassandra,spodkowinski/cassandra,aureagle/cassandra,clohfink/cassandra,mambocab/cassandra,scylladb/scylla-tools-java,ben-manes/cassandra,tjake/cassandra,mshuler/cassandra,scaledata/cassandra,hengxin/cassandra,bdeggleston/cassandra,krummas/cassandra,snazy/cassandra,nitsanw/cassandra,aweisberg/cassandra,chbatey/cassandra-1,bmel/cassandra,thobbs/cassandra,bdeggleston/cassandra,DikangGu/cassandra,scylladb/scylla-tools-java,mkjellman/cassandra,ben-manes/cassandra,thobbs/cassandra,michaelsembwever/cassandra,scylladb/scylla-tools-java,sharvanath/cassandra,stef1927/cassandra,yhnishi/cassandra,scylladb/scylla-tools-java,michaelsembwever/cassandra,exoscale/cassandra,yukim/cassandra,thelastpickle/cassandra,weideng1/cassandra,pauloricardomg/cassandra,yhnishi/cassandra,nitsanw/cassandra,sedulam/CASSANDRA-12201,krummas/cassandra,sedulam/CASSANDRA-12201,belliottsmith/cassandra,ptnapoleon/cassandra,Imran-C/cassandra,mkjellman/cassandra,yukim/cassandra,jasobrown/cassandra,spodkowinski/cassandra,jbellis/cassandra,chbatey/cassandra-1,stef1927/cassandra,adejanovski/cassandra,yhnishi/cassandra,mkjellman/cassandra,scaledata/cassandra,jasonwee/cassandra,christian-esken/cassandra,ollie314/cassandra,driftx/cassandra,bdeggleston/cassandra,mkjellman/cassandra,hhorii/cassandra,apache/cassandra,ifesdjeen/cassandra,carlyeks/cassandra,bmel/cassandra,weideng1/cassandra,mike-tr-adamson/cassandra,clohfink/cassandra,jbellis/cassandra,vaibhi9/cassandra,pauloricardomg/cassandra,Instagram/cassandra,jbellis/cassandra,jasonstack/cassandra,juiceblender/cassandra,aweisberg/cassandra,blambov/cassandra,szhou1234/cassandra,WorksApplications/cassandra,strapdata/cassandra,blambov/cassandra,mshuler/cassandra,exoscale/cassandra,aureagle/cassandra,jeromatron/cassandra,bcoverston/cassandra,carlyeks/cassandra,modempachev4/kassandra,jrwest/cassandra,michaelsembwever/cassandra,yukim/cassandra,Jollyplum/cassandra,iamaleksey/cassandra,josh-mckenzie/cassandra,iamaleksey/cassandra,sharvanath/cassandra,jeromatron/cassandra,Instagram/cassandra,ben-manes/cassandra,josh-mckenzie/cassandra,scaledata/cassandra,tommystendahl/cassandra,aboudreault/cassandra,instaclustr/cassandra,WorksApplications/cassandra,driftx/cassandra,krummas/cassandra,snazy/cassandra,christian-esken/cassandra,sedulam/CASSANDRA-12201,adelapena/cassandra,instaclustr/cassandra,joesiewert/cassandra,mike-tr-adamson/cassandra,nitsanw/cassandra,vaibhi9/cassandra,adelapena/cassandra,hengxin/cassandra,pauloricardomg/cassandra,adejanovski/cassandra,kgreav/cassandra,belliottsmith/cassandra,szhou1234/cassandra,RyanMagnusson/cassandra,instaclustr/cassandra,tommystendahl/cassandra,aweisberg/cassandra,blambov/cassandra,beobal/cassandra,spodkowinski/cassandra,chbatey/cassandra-1,pauloricardomg/cassandra,aboudreault/cassandra,modempachev4/kassandra,mike-tr-adamson/cassandra,clohfink/cassandra,aweisberg/cassandra,Imran-C/cassandra,beobal/cassandra,blerer/cassandra,stef1927/cassandra,stef1927/cassandra,blerer/cassandra,modempachev4/kassandra,joesiewert/cassandra,thelastpickle/cassandra,bdeggleston/cassandra,iamaleksey/cassandra,belliottsmith/cassandra,ptnapoleon/cassandra,jeffjirsa/cassandra,RyanMagnusson/cassandra,DikangGu/cassandra,strapdata/cassandra,blambov/cassandra,krummas/cassandra,apache/cassandra,ollie314/cassandra,instaclustr/cassandra,jasonstack/cassandra,snazy/cassandra,yukim/cassandra,jeromatron/cassandra,apache/cassandra,pthomaid/cassandra,josh-mckenzie/cassandra,hhorii/cassandra,tommystendahl/cassandra,driftx/cassandra,pthomaid/cassandra,jrwest/cassandra,Jaumo/cassandra,vaibhi9/cassandra,hengxin/cassandra,bmel/cassandra,WorksApplications/cassandra,aboudreault/cassandra,szhou1234/cassandra,szhou1234/cassandra,exoscale/cassandra,iamaleksey/cassandra,Imran-C/cassandra,cooldoger/cassandra,bcoverston/cassandra,strapdata/cassandra,beobal/cassandra,RyanMagnusson/cassandra,christian-esken/cassandra,mambocab/cassandra,kgreav/cassandra,mike-tr-adamson/cassandra,jasobrown/cassandra,Jollyplum/cassandra,tommystendahl/cassandra,joesiewert/cassandra,thelastpickle/cassandra,cooldoger/cassandra,adelapena/cassandra,tjake/cassandra,kgreav/cassandra,pthomaid/cassandra,spodkowinski/cassandra,Jaumo/cassandra