Update BungeePerms.java

use this plugin in linux(ubuntu server 14.4 X64)  and use comand "BP"   
server back 


 Plugin performed restricted action, please inform them to use proper API methods: Illegal thread group access
java.security.AccessControlException: Plugin violation: Illegal thread group access
    at net.md_5.bungee.BungeeSecurityManager.checkRestricted(BungeeSecurityManager.java:39)
    at net.md_5.bungee.BungeeSecurityManager.checkAccess(BungeeSecurityManager.java:62)
    at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:315)
    at java.lang.Thread.init(Thread.java:391)
    at java.lang.Thread.init(Thread.java:349)
    at java.lang.Thread.<init>(Thread.java:461)
    at net.alpenblock.bungeeperms.BungeePerms$1.execute(BungeePerms.java:1479)
    at net.md_5.bungee.api.plugin.PluginManager.dispatchCommand(PluginManager.java:159)
    at net.md_5.bungee.api.plugin.PluginManager.dispatchCommand(PluginManager.java:116)
    at net.md_5.bungee.BungeeCordLauncher.main(BungeeCordLauncher.java:57)
    at net.md_5.bungee.Bootstrap.main(Bootstrap.java:15)


so use runAsync clean  this bug