Allow pid file to be read by mere mortals.
Allow pid file to be read by mere mortals.

Patch by Michael Shuler, reviewed by brandonwilliams for CASSANDRA-7851

driftx/cassandra,guanxi55nba/db-improvement,wreda/cassandra,clohfink/cassandra,pofallon/cassandra,ptnapoleon/cassandra,DikangGu/cassandra,adejanovski/cassandra,apache/cassandra,sluk3r/cassandra,mshuler/cassandra,juiceblender/cassandra,mshuler/cassandra,DICL/cassandra,yukim/cassandra,ejankan/cassandra,boneill42/cassandra,pofallon/cassandra,DikangGu/cassandra,jrwest/cassandra,xiongzheng/Cassandra-Research,mheffner/cassandra-1,iamaleksey/cassandra,jbellis/cassandra,thelastpickle/cassandra,spodkowinski/cassandra,swps/cassandra,jeffjirsa/cassandra,ptuckey/cassandra,sluk3r/cassandra,nutbunnies/cassandra,jrwest/cassandra,krummas/cassandra,Jaumo/cassandra,jasonwee/cassandra,jasobrown/cassandra,rdio/cassandra,tjake/cassandra,regispl/cassandra,bpupadhyaya/cassandra,mkjellman/cassandra,GabrielNicolasAvellaneda/cassandra,Stratio/stratio-cassandra,rackerlabs/cloudmetrics-cassandra,apache/cassandra,LatencyUtils/cassandra-stress2,weipinghe/cassandra,phact/cassandra,aweisberg/cassandra,vramaswamy456/cassandra,scylladb/scylla-tools-java,belliottsmith/cassandra,phact/cassandra,sayanh/ViewMaintenanceCassandra,driftx/cassandra,WorksApplications/cassandra,ptuckey/cassandra,tjake/cassandra,bdeggleston/cassandra,driftx/cassandra,mt0803/cassandra,michaelsembwever/cassandra,sivikt/cassandra,iburmistrov/Cassandra,apache/cassandra,JeremiahDJordan/cassandra,vaibhi9/cassandra,jbellis/cassandra,yukim/cassandra,strapdata/cassandra,spodkowinski/cassandra,rdio/cassandra,a-buck/cassandra,ejankan/cassandra,ptnapoleon/cassandra,DikangGu/cassandra,blambov/cassandra,mambocab/cassandra,kangkot/stratio-cassandra,MasahikoSawada/cassandra,jeromatron/cassandra,sayanh/ViewMaintenanceCassandra,LatencyUtils/cassandra-stress2,bpupadhyaya/cassandra,likaiwalkman/cassandra,macintoshio/cassandra,belliottsmith/cassandra,ollie314/cassandra,hengxin/cassandra,chbatey/cassandra-1,sivikt/cassandra,codefollower/Cassandra-Research,juiceblender/cassandra,jeffjirsa/cassandra,pofallon/cassandra,mashuai/Cassandra-Research,stef1927/cassandra,tongjixianing/projects,boneill42/cassandra,iamaleksey/cassandra,darach/cassandra,szhou1234/cassandra,scaledata/cassandra,bdeggleston/cassandra,mkjellman/cassandra,bcoverston/cassandra,Stratio/stratio-cassandra,ben-manes/cassandra,iburmistrov/Cassandra,knifewine/cassandra,carlyeks/cassandra,thobbs/cassandra,weideng1/cassandra,pauloricardomg/cassandra,aboudreault/cassandra,jeromatron/cassandra,tjake/cassandra,mashuai/Cassandra-Research,ifesdjeen/cassandra,nitsanw/cassandra,strapdata/cassandra,aboudreault/cassandra,beobal/cassandra,shawnkumar/cstargraph,ifesdjeen/cassandra,fengshao0907/Cassandra-Research,sharvanath/cassandra,michaelsembwever/cassandra,mike-tr-adamson/cassandra,hhorii/cassandra,nvoron23/cassandra,helena/cassandra,WorksApplications/cassandra,sharvanath/cassandra,mheffner/cassandra-1,weideng1/cassandra,hhorii/cassandra,sharvanath/cassandra,ollie314/cassandra,tjake/cassandra,dkua/cassandra,pallavi510/cassandra,joesiewert/cassandra,yangzhe1991/cassandra,instaclustr/cassandra,jrwest/cassandra,blerer/cassandra,rogerchina/cassandra,chbatey/cassandra-1,swps/cassandra,Bj0rnen/cassandra,beobal/cassandra,GabrielNicolasAvellaneda/cassandra,MasahikoSawada/cassandra,clohfink/cassandra,mike-tr-adamson/cassandra,newrelic-forks/cassandra,xiongzheng/Cassandra-Research,exoscale/cassandra,fengshao0907/cassandra-1,scylladb/scylla-tools-java,aweisberg/cassandra,Instagram/cassandra,AtwooTM/cassandra,sedulam/CASSANDRA-12201,carlyeks/cassandra,iamaleksey/cassandra,ifesdjeen/cassandra,MasahikoSawada/cassandra,boneill42/cassandra,dkua/cassandra,mshuler/cassandra,helena/cassandra,jasobrown/cassandra,michaelmior/cassandra,yanbit/cassandra,snazy/cassandra,hengxin/cassandra,AtwooTM/cassandra,a-buck/cassandra,jsanda/cassandra,mt0803/cassandra,scaledata/cassandra,rmarchei/cassandra,pthomaid/cassandra,yanbit/cassandra,gdusbabek/cassandra,Bj0rnen/cassandra,jeromatron/cassandra,Imran-C/cassandra,LatencyUtils/cassandra-stress2,AtwooTM/cassandra,jkni/cassandra,pkdevbox/cassandra,EnigmaCurry/cassandra,jeffjirsa/cassandra,regispl/cassandra,wreda/cassandra,Jaumo/cassandra,rackerlabs/cloudmetrics-cassandra,pauloricardomg/cassandra,Jaumo/cassandra,modempachev4/kassandra,mkjellman/cassandra,newrelic-forks/cassandra,vramaswamy456/cassandra,lalithsuresh/cassandra-c3,mashuai/Cassandra-Research,emolsson/cassandra,jasonstack/cassandra,krummas/cassandra,chaordic/cassandra,DICL/cassandra,weipinghe/cassandra,fengshao0907/cassandra-1,Instagram/cassandra,aweisberg/cassandra,Instagram/cassandra,yangzhe1991/cassandra,Jollyplum/cassandra,Imran-C/cassandra,EnigmaCurry/cassandra,gdusbabek/cassandra,jasonstack/cassandra,blambov/cassandra,fengshao0907/cassandra-1,mike-tr-adamson/cassandra,lalithsuresh/cassandra-c3,josh-mckenzie/cassandra,JeremiahDJordan/cassandra,bmel/cassandra,Stratio/stratio-cassandra,DICL/cassandra,jbellis/cassandra,snazy/cassandra,rogerchina/cassandra,blerer/cassandra,rmarchei/cassandra,michaelsembwever/cassandra,thobbs/cassandra,beobal/cassandra,qinjin/mdtc-cassandra,aboudreault/cassandra,dongjiaqiang/cassandra,RyanMagnusson/cassandra,sayanh/ViewMaintenanceCassandra,belliottsmith/cassandra,scylladb/scylla-tools-java,christian-esken/cassandra,jeffjirsa/cassandra,Jollyplum/cassandra,blambov/cassandra,ifesdjeen/cassandra,yanbit/cassandra,tommystendahl/cassandra,pcn/cassandra-1,beobal/cassandra,scaledata/cassandra,knifewine/cassandra,jasobrown/cassandra,bmel/cassandra,RyanMagnusson/cassandra,jsanda/cassandra,pcn/cassandra-1,bmel/cassandra,weideng1/cassandra,gdusbabek/cassandra,xiongzheng/Cassandra-Research,christian-esken/cassandra,dongjiaqiang/cassandra,rdio/cassandra,hhorii/cassandra,asias/cassandra,macintoshio/cassandra,pcmanus/cassandra,tongjixianing/projects,aureagle/cassandra,jkni/cassandra,mambocab/cassandra,sayanh/ViewMaintenanceSupport,adejanovski/cassandra,exoscale/cassandra,sedulam/CASSANDRA-12201,ejankan/cassandra,spodkowinski/cassandra,aureagle/cassandra,emolsson/cassandra,Instagram/cassandra,driftx/cassandra,pcmanus/cassandra,josh-mckenzie/cassandra,fengshao0907/Cassandra-Research,yangzhe1991/cassandra,tommystendahl/cassandra,clohfink/cassandra,Jollyplum/cassandra,mike-tr-adamson/cassandra,mambocab/cassandra,guard163/cassandra,pkdevbox/cassandra,sivikt/cassandra,WorksApplications/cassandra,dkua/cassandra,Stratio/stratio-cassandra,cooldoger/cassandra,nvoron23/cassandra,sluk3r/cassandra,whitepages/cassandra,adelapena/cassandra,jkni/cassandra,kgreav/cassandra,helena/cassandra,szhou1234/cassandra,modempachev4/kassandra,pthomaid/cassandra,Stratio/stratio-cassandra,guard163/cassandra,rogerchina/cassandra,adelapena/cassandra,jasonwee/cassandra,aarushi12002/cassandra,kgreav/cassandra,blerer/cassandra,carlyeks/cassandra,exoscale/cassandra,cooldoger/cassandra,aureagle/cassandra,shawnkumar/cstargraph,aweisberg/cassandra,darach/cassandra,yonglehou/cassandra,caidongyun/cassandra,darach/cassandra,bcoverston/cassandra,joesiewert/cassandra,thobbs/cassandra,pcn/cassandra-1,mt0803/cassandra,pauloricardomg/cassandra,yhnishi/cassandra,WorksApplications/cassandra,vramaswamy456/cassandra,michaelsembwever/cassandra,yhnishi/cassandra,lalithsuresh/cassandra-c3,szhou1234/cassandra,christian-esken/cassandra,guanxi55nba/db-improvement,belliottsmith/cassandra,aarushi12002/cassandra,yonglehou/cassandra,josh-mckenzie/cassandra,pauloricardomg/cassandra,whitepages/cassandra,regispl/cassandra,chbatey/cassandra-1,adejanovski/cassandra,kangkot/stratio-cassandra,caidongyun/cassandra,phact/cassandra,caidongyun/cassandra,yukim/cassandra,asias/cassandra,fengshao0907/Cassandra-Research,EnigmaCurry/cassandra,mshuler/cassandra,bcoverston/cassandra,ollie314/cassandra,nutbunnies/cassandra,stef1927/cassandra,yukim/cassandra,juiceblender/cassandra,pallavi510/cassandra,kangkot/stratio-cassandra,blerer/cassandra,likaiwalkman/cassandra,chaordic/cassandra,aarushi12002/cassandra,kangkot/stratio-cassandra,guard163/cassandra,iamaleksey/cassandra,jasonstack/cassandra,swps/cassandra,JeremiahDJordan/cassandra,cooldoger/cassandra,yonglehou/cassandra,snazy/cassandra,codefollower/Cassandra-Research,kangkot/stratio-cassandra,adelapena/cassandra,emolsson/cassandra,knifewine/cassandra,RyanMagnusson/cassandra,spodkowinski/cassandra,GabrielNicolasAvellaneda/cassandra,weipinghe/cassandra,instaclustr/cassandra,adelapena/cassandra,qinjin/mdtc-cassandra,juiceblender/cassandra,ben-manes/cassandra,jsanda/cassandra,sedulam/CASSANDRA-12201,newrelic-forks/cassandra,asias/cassandra,shawnkumar/cstargraph,thelastpickle/cassandra,mheffner/cassandra-1,qinjin/mdtc-cassandra,blambov/cassandra,thelastpickle/cassandra,rmarchei/cassandra,guanxi55nba/db-improvement,thelastpickle/cassandra,vaibhi9/cassandra,pthomaid/cassandra,josh-mckenzie/cassandra,szhou1234/cassandra,pkdevbox/cassandra,tommystendahl/cassandra,chaordic/cassandra,iburmistrov/Cassandra,nutbunnies/cassandra,pcmanus/cassandra,jrwest/cassandra,tommystendahl/cassandra,whitepages/cassandra,bpupadhyaya/cassandra,krummas/cassandra,kgreav/cassandra,kgreav/cassandra,macintoshio/cassandra,ptnapoleon/cassandra,joesiewert/cassandra,strapdata/cassandra,cooldoger/cassandra,mkjellman/cassandra,sayanh/ViewMaintenanceSupport,nitsanw/cassandra,stef1927/cassandra,apache/cassandra,clohfink/cassandra,instaclustr/cassandra,bdeggleston/cassandra,tongjixianing/projects,instaclustr/cassandra,nitsanw/cassandra,modempachev4/kassandra,ptuckey/cassandra,strapdata/cassandra,likaiwalkman/cassandra,jasonwee/cassandra,hengxin/cassandra,codefollower/Cassandra-Research,michaelmior/cassandra,Bj0rnen/cassandra,krummas/cassandra,stef1927/cassandra,snazy/cassandra,Imran-C/cassandra,scylladb/scylla-tools-java,bdeggleston/cassandra,nvoron23/cassandra,rackerlabs/cloudmetrics-cassandra,michaelmior/cassandra,yhnishi/cassandra,pallavi510/cassandra,vaibhi9/cassandra,dongjiaqiang/cassandra,a-buck/cassandra,wreda/cassandra,jasobrown/cassandra,ben-manes/cassandra,bcoverston/cassandra