dcmp: improve the usage()
We have already supported multi output files with different filters,
likes following:
dcmp foo_src foo_dst -o EXIST=ONLY_SRC,TYPE=DIFFER,PERM=DIFFER,MTIME=DIFFER:fileA -o MTIME=DIFFER:fileB
but the usage doesn't say it, so add it now.
@@ -51,6 +51,9 @@ static void print_usage(void)
printf(" -b, --base - do base comparison\n");
printf(" -o, --output field0=state0@field1=state1,field2=state2:file "
"- write list to file\n");
+ printf(" multiple output files supports, e.g.\n");
+ printf(" -o EXIST=ONLY_SRC,TYPE=DIFFER,PERM=DIFFER,MTIME=DIFFER:"
+ "fileA -o MTIME=DIFFER:fileB\n");
printf(" -v, --verbose\n");
printf(" -h, --help - print usage\n");
printf("\n");
