Update global.inc.dist.php
Update global.inc.dist.php

* Adjusted default difficulty in `config.inc.dist.php` to `20` which seems to be stratum default.
ychaim/php-mpos,mculp/chunky-mpos,sasselin/xcoin-mpos,UNOMP/chunky-mpos,sixxkilur/php-mpos,mmitech/php-mpos,evgenyponomarev/pool,BlueDragon747/php-mpos,studio666/php-mpos,BlueDragon747/php-mpos,bankonme/php-mpos,machinecoin-project/php-mpos,shreeneve/test,mmitech/php-mpos,MPOS/php-mpos,evgenyponomarev/pool,xisi/php-mpos,sasselin/xcoin-mpos,UNOMP/chunky-mpos,MPOS/php-mpos,sasselin/xcoin-mpos,CoinHashMe/MPOS-SSO,MPOS/php-mpos,CoinHashMe/MPOS-SSO,BlueDragon747/php-mpos,sixxkilur/php-mpos,studio666/php-mpos,nimblecoin/web,mculp/chunky-mpos,UNOMP/chunky-mpos,shreeneve/test,ychaim/php-mpos,machinecoin-project/php-mpos,bankonme/php-mpos,shreeneve/test,nimblecoin/web,xisi/php-mpos,evgenyponomarev/pool,sixxkilur/php-mpos,CoinHashMe/MPOS-SSO,ychaim/php-mpos,mmitech/php-mpos,nimblecoin/web,mculp/chunky-mpos,bankonme/php-mpos,UNOMP/chunky-mpos,machinecoin-project/php-mpos,studio666/php-mpos,CoinHashMe/MPOS-SSO,CoinHashMe/MPOS-SSO,xisi/php-mpos,mculp/chunky-mpos