FS-3277 --resolve There are actually really only 2 places where it needs the real hostname, the hostname command and the header on the events. I changed everything to the switchname because there were some more sql stmts etc in the core.

src/include/switch_core.h

@@ -762,6 +762,7 @@ SWITCH_DECLARE(char *) switch_core_get_variable(_In_z_ const char *varname);
 SWITCH_DECLARE(char *) switch_core_get_variable_dup(_In_z_ const char *varname);
 SWITCH_DECLARE(char *) switch_core_get_variable_pdup(_In_z_ const char *varname, switch_memory_pool_t *pool);
 SWITCH_DECLARE(const char *) switch_core_get_hostname(void);
+SWITCH_DECLARE(const char *) switch_core_get_switchname(void);
 
 /*! 
   \brief Add a global variable to the core