tar.1: convert to mandoc

- simplify usage line.
- add new flags (-m, -j and -z).
- fix typos.

tar.1

@@ -1,62 +1,60 @@
-.TH TAR 1 sbase\-VERSION
+.Dd January 31, 2015
-.SH NAME
+.Dt TAR 1 sbase\-VERSION
-tar \- create, list or extract a tape archive
+.Os
-.SH SYNOPSIS
+.Sh NAME
-.B tar
+.Nm tar
-.RB [ \-f
+.Nd create, list or extract a tape archive
-.IR tarfile]
+.Sh SYNOPSIS
-.RB [ \-C
+.Nm
-.IR dir ]
+.Op Fl C Ar dir
-.RB [ - ] x | t
+.Op Fl jz
-
+.Fl x Op Fl m
-.B tar
+|
-.RB [ \-f
+.Fl t
-.IR tarfile]
+.Op Fl f Ar tarfile
-.RB [ \-C
+.Nm
-.IR dir ]
+.Op Fl C Ar dir
-.RB [ - ] c
+.Op Fl jz
-.I dir
+.Fl c Ar dir
-
+.Op Fl f Ar tarfile
-.B tar
+.Nm
-.RB [ \-C
+.Op Fl C Ar dir
-.IR dir ]
+.Op Fl jz
-.B cf
+.Fl cf
-.I tarfile
+.Ar tarfile Ar dir
-.I dir
+.Sh DESCRIPTION
-
+.Nm
-.B tar
-.RB [ \-C
-.IR dir ]
-.B x|tf
-.I tarfile
-
-.SH DESCRIPTION
-.B tar
 is the standard file archiver. Generally the archives
 created with it are further compressed.
-.SH OPTIONS
+.Sh OPTIONS
-.TP
+.Bl -tag -width Ds
-.B x
+.It Fl c Ar path
-extract tarball from stdin
+Creates tarball from
-.TP
+.Ar path .
-.B t
+.It Fl C Ar dir
-list all files in tarball from stdin
+Change directory to
-.TP
+.Ar dir
-.BI c\  path
-creates tarball from
-.I path
-and prints it to stdout
-.TP
-.BI f\  tarfile
-Make
-.I tarfile
-be the archive, rather than stdin or stdout.
-.TP
-.BI C\ dir
-Change dierctory to
-.I dir
 before beginning.
-.SH SEE ALSO
+.It Fl f Ar tarfile
-.IR ar (1)
+Make
-.IR gzip (1)
+.Ar tarfile
-.IR bzip2 (1)
+be the archive, rather than stdin or stdout.
+.It Fl j
+Compress archive using bzip2. The
+.Xr bzip2 1
+utility must be installed separately.
+.It Fl m
+Do not preserve modification time.
+.It Fl t
+List all files in tarball.
+.It Fl x
+Extract tarball.
+.It Fl z
+Compress archive using gzip. The
+.Xr gzip 1
+utility must be installed separately.
+.El
+.Sh SEE ALSO
+.Xr ar 1 ,
+.Xr bzip2 1 ,
+.Xr gzip 1