Merge in two patches from Dave Cinege:

the first is a cleanup of tar --exclude
    the second changes mount so mtab works more as it should, and
    also allows mount to use the traditional short form (i.e.
    'mount / -o remount,rw' now works.

While inside tar, I changed it to use getopt...
 -Erik

usage.c

@@ -1053,7 +1053,7 @@ const char tar_usage[] =
 	"tar -[xtvO] "
 #endif
 #if defined BB_FEATURE_TAR_EXCLUDE
-	"[-X File(s)] "
+	"[--exclude File] "
 #endif
 	"[-f tarFile] [FILE(s)] ...\n"
 #ifndef BB_FEATURE_TRIVIAL_HELP
@@ -1069,7 +1069,7 @@ const char tar_usage[] =
 	"\tf\t\tname of tarfile or \"-\" for stdin\n"
 	"\tO\t\textract to stdout\n"
 #if defined BB_FEATURE_TAR_EXCLUDE
-	"\tX\t\tfile(s) to exclude\n"
+	"\texclude\t\tfile to exclude\n"
 #endif
 	"\nInformative output:\n"
 	"\tv\t\tverbosely list files processed\n"