add -h option

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+.TH "hardlink" "1"
+.SH "NAME"
+hardlink \- Consolidate duplicate files via hardlinks
+.SH "SYNOPSIS"
+.PP
+\fBhardlink\fP [\fB-c\fP] [\fB-n\fP] [\fB-v\fP] [\fB-h\fP] directory1 [ directory2 ... ]
+.SH "DESCRIPTION"
+.PP
+This manual page documents \fBhardlink\fP, a 
+program which consolidates duplicate files in one or more directories
+using hardlinks.
+.PP
+\fBhardlink\fP traverses one 
+or more directories searching for duplicate files.  When it finds duplicate
+files, it uses one of them as the master.  It then removes all other
+duplicates and places a hardlink for each one pointing to the master file.
+This allows for conservation of disk space where multiple directories
+on a single filesystem contain many duplicate files.
+.PP
+Since hard links can only span a single filesystem, \fBhardlink\fP
+is only useful when all directories specified are on the same filesystem.
+.SH "OPTIONS"
+.PP
+.IP "\fB-c\fP" 10
+Compare only the contents of the files being considered for consolidation.
+Disregards permission, ownership and other differences.
+.IP "\fB-n\fP" 10
+Do not perform the consolidation; only print what would be changed.
+.IP "\fB-v\fP" 10
+Enable verbose logging.
+.IP "\fB-h\fP" 10
+Show help.
+.SH "AUTHOR"
+.PP
+\fBhardlink\fP was written by Jakub Jelinek <jakub@redhat.com>. 
+.PP
+Man page written by Brian Long.
+.PP
+Man page updated by Jindrich Novy <jnovy@redhat.com>