Checkmk Werk 13353: Linux agent: Fix two localisation issues

ID: 13353 Title: Linux agent: Fix two localisation issues Component: Checks & agents Level: 1 Class: Bug fix Version: 2.1.0i1 On some systems, the linux agent tried to set invalid localisation settings. For example, when <tt>C.utf8</tt> is not available, but <tt>es_EC.utf8</tt> is, the agent still tried to set <tt>C.utf8</tt> as localisation, which resulted in the error <tt>setlocale: LC_ALL: cannot change locale</tt>. Furthermore, in the rare case where the <tt>locale</tt> or the <tt>inpath</tt> command were not available, no localisation was set. These cases now default to <tt>LC_ALL=C</tt>.