Use mbstring in flowdock handler when possible to compute short messages, fixes #567
Use mbstring in flowdock handler when possible to compute short messages, fixes #567

bd808/monolog,chinaweilu/monolog,gencer/monolog,Sgoettschkes/monolog,Seldaek/monolog,thiagotalma/monolog,aeryaguzov/monolog,dangnguyen27/monolog,brendo/monolog,webwlsong/monolog,prgTW/monolog,netgusto/monolog,JCook21/monolog,lyrixx/monolog,mbrevda/monolog,cherrytech/monolog,pomaxa/monolog,printerpam/monolog,localheinz/monolog,deguif/monolog,dailymotion/monolog,rap2hpoutre/monolog,dracony/monolog,tavrij/test