Check_MK Werk 5229: Rename host: fixed exception when having more than 1024 users configured

ID: 5229 Title: Rename host: fixed exception when having more than 1024 users configured Component: WATO Level: 1 Class: Bug fix Version: 1.5.0i1 For each configured user, WATO kept a file open during the rename procedure. Having more than 1024 users breached the <tt>ulimit -n</tt> option and a <tt>Too many open files</tt> exception occurred.