cli: compare nmcli and NM versions

nmcli gets NM version and compares it with its own and complains
when they differ. This is to indicate that the results are not reliable,
because the API could differ. '--nocheck' switches the checks off.

cli/src/utils.h

@@ -33,5 +33,6 @@ GArray *parse_output_fields (const char *fields_str, const NmcOutputField fields
 gboolean nmc_terse_option_check (NMCPrintOutput print_output, const char *fields, GError **error);
 void print_fields (const NmcPrintFields fields, const NmcOutputField field_values[]);
 gboolean nmc_is_nm_running (NmCli *nmc, GError **error);
+gboolean nmc_versions_match (NmCli *nmc);
 
 #endif /* NMC_UTILS_H */