Clarified --remove-older-than entry.

git-svn-id: http://svn.savannah.nongnu.org/svn/rdiff-backup@310 2b77aa54-bcbc-44c9-a7ec-4f6cf2b41109

trunk/rdiff-backup/rdiff-backup.1

@@ -198,9 +198,8 @@ that directory.
 .TP
 .B "-l, --list-increments"
 List the number and date of partial incremental backups contained in
-the specified destination directory.  This option is incompatible with
-backing up or restoring and must be run in a separate instance of
-rdiff-backup.
+the specified destination directory.  No backup or restore will take
+place if this option is given.
 .TP
 .B "-m, --mirror-only"
 Do not create an rdiff-backup-data directory or make any increments.
@@ -303,10 +302,12 @@ example, 32m means 32 minutes, and 3W2D10h7s means 3 weeks, 2 days, 10
 hours, and 7 seconds.  In this context, a month means 30 days, a year
 is 365 days, and a day is always 86400 seconds.
 
-Note that this option is incompatible with backing up or restoring and
-must be run in a separate instance of rdiff-backup.  Remember also
-that snapshots of deleted files are covered by this operation, so if
-you deleted a file and backed up two weeks ago, and then run
+rdiff-backup cannot remove-older-than and back up or restore in a
+single session.  If you want to, for instance, backup a directory and
+remove old files in it, you must run rdiff-backup twice.
+
+Note that snapshots of deleted files are covered by this operation, so
+if you deleted a file and backed up two weeks ago, and then run
 --remove-older-than 10D today, no trace of that file will remain.
 Finally, file selection options such as --include and --exclude don't
 affect --remove-older-than.