Added Prefix Option to run-crons.sh PID File.
Added Prefix Option to run-crons.sh PID File.

Added configuration option 'PIDPREFIX' to add to PIDFILE name, so it will be unique in a multipool server.
ychaim/php-mpos,CoinHashMe/MPOS-SSO,MPOS/php-mpos,CoinHashMe/MPOS-SSO,machinecoin-project/php-mpos,shreeneve/test,sixxkilur/php-mpos,mmitech/php-mpos,mmitech/php-mpos,evgenyponomarev/pool,ychaim/php-mpos,machinecoin-project/php-mpos,studio666/php-mpos,mmitech/php-mpos,UNOMP/chunky-mpos,nimblecoin/web,mculp/chunky-mpos,evgenyponomarev/pool,CoinHashMe/MPOS-SSO,UNOMP/chunky-mpos,MPOS/php-mpos,BlueDragon747/php-mpos,shreeneve/test,mculp/chunky-mpos,xisi/php-mpos,UNOMP/chunky-mpos,UNOMP/chunky-mpos,sasselin/xcoin-mpos,xisi/php-mpos,sasselin/xcoin-mpos,BlueDragon747/php-mpos,CoinHashMe/MPOS-SSO,bankonme/php-mpos,CoinHashMe/MPOS-SSO,mculp/chunky-mpos,bankonme/php-mpos,evgenyponomarev/pool,nimblecoin/web,mculp/chunky-mpos,bankonme/php-mpos,nimblecoin/web,sixxkilur/php-mpos,sasselin/xcoin-mpos,BlueDragon747/php-mpos,xisi/php-mpos,studio666/php-mpos,machinecoin-project/php-mpos,shreeneve/test,studio666/php-mpos,ychaim/php-mpos,MPOS/php-mpos,sixxkilur/php-mpos