Enforce session logout if IP address changed
Enforce session logout if IP address changed

Fixes #179

shreeneve/test,evgenyponomarev/pool,xisi/php-mpos,MPOS/php-mpos,shreeneve/test,shreeneve/test,nimblecoin/web,evgenyponomarev/pool,sasselin/xcoin-mpos,mculp/chunky-mpos,nimblecoin/web,sasselin/xcoin-mpos,sixxkilur/php-mpos,mmitech/php-mpos,mmitech/php-mpos,ychaim/php-mpos,ychaim/php-mpos,machinecoin-project/php-mpos,sixxkilur/php-mpos,CoinHashMe/MPOS-SSO,UNOMP/chunky-mpos,nimblecoin/web,sasselin/xcoin-mpos,BlueDragon747/php-mpos,CoinHashMe/MPOS-SSO,MPOS/php-mpos,mculp/chunky-mpos,mculp/chunky-mpos,mmitech/php-mpos,studio666/php-mpos,UNOMP/chunky-mpos,studio666/php-mpos,bankonme/php-mpos,xisi/php-mpos,MPOS/php-mpos,CoinHashMe/MPOS-SSO,ychaim/php-mpos,CoinHashMe/MPOS-SSO,bankonme/php-mpos,sixxkilur/php-mpos,mculp/chunky-mpos,machinecoin-project/php-mpos,UNOMP/chunky-mpos,evgenyponomarev/pool,BlueDragon747/php-mpos,bankonme/php-mpos,BlueDragon747/php-mpos,xisi/php-mpos,UNOMP/chunky-mpos,studio666/php-mpos,CoinHashMe/MPOS-SSO,machinecoin-project/php-mpos