adds a redis handler
adds a redis handler

This is useful when used in conjuction with the LogstashFormatter, but
should also be useful for any formatter where $message["formatted"] is
a string.

dracony/monolog,yaoshanliang/monolog,supre/monolog,aeryaguzov/monolog,netgusto/monolog,glensc/php-monolog,EmmanuelVella/monolog,localheinz/monolog,prgTW/monolog,rap2hpoutre/monolog,nike-17/monolog,staabm/monolog,bd808/monolog,Stype/monolog,dangnguyen27/monolog,mbrevda/monolog,thiagotalma/monolog,oswaldderiemaecker/monolog,JeroenDeDauw/monolog,0x46616c6b/monolog,chinaweilu/monolog,esalter/monolog,entwu/monolog,dailymotion/monolog,webwlsong/monolog,pomaxa/monolog,Sgoettschkes/monolog,brendo/monolog,rs/monolog,KevinMGranger/monolog,tavrij/test,deguif/monolog,ehough/epilog,printerpam/monolog,vallejos/monolog,stof/monolog,lyrixx/monolog,gencer/monolog,cherrytech/monolog,JCook21/monolog,yegortokmakov/monolog,peterkokot/monolog,Seldaek/monolog