added qemu-mkcow man page

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+.\" $Header: /home/paul/qemu/svnmerge/qemu-cvs/qemu/qemu-mkcow.1,v 1.1 2004-03-26 22:42:54 bellard Exp $
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+'\" t 
+.ta 8n 16n 24n 32n 40n 48n 56n 64n 72n  
+.TH "QEMU" "8" 
+.SH "NAME" 
+qemu-mkcow \(em create a copy-on-write file for qemu 
+.SH "SYNOPSIS" 
+.PP 
+\fBqemu-mkcow\fR [\fB-h\fP]  [\fB-f \fImaster_disk_image\fR\fP]  [\fIcow_image\fR]  [\fB\fIcow_size\fR\fP]  
+.SH "DESCRIPTION" 
+.PP 
+The \fBqemu-mkcow\fR command creates a 
+persistent copy-on-write file for \fBqemu\fR. 
+ 
+.PP 
+\fBqemu\fR can be used in a "copy-on-write" mode, 
+where changes made by \fBqemu\fR do not actually 
+change the disk image file.  One way is to invoke 
+\fBqemu\fR with -snapshot: these changes 
+are stored in a temporary file, which is discarded when  
+\fBqemu\fR exits. 
+ 
+.PP 
+\fBqemu-mkcow\fR creates an explicit copy-on-write 
+file where changes are to be stored: this way, changes made 
+inside \fBqemu\fR will still be there next time you 
+run it, although the master disk image isn't ever changed. 
+ 
+.PP 
+The usual method is to create the master image, then create a 
+copy-on-write file using \fBqemu-mkcow\fR with 
+\fB-f\fP.  The filename of the master image is stored 
+inside the generated copy-on-write file: it must not be modified 
+after this is run! 
+ 
+.PP 
+If no master file is specified, the effect is that of a 
+blank master of size \fIcow_size\fR. 
+ 
+.SH "SEE ALSO" 
+.PP 
+qemu(1), qemu-fast(1). 
+.SH "AUTHOR" 
+.PP 
+This manual page was written by Paul Russell prussell@debian.org for 
+the \fBDebian\fP system (but may be used by others).  Permission is 
+granted to copy, distribute and/or modify this document under 
+the terms of the GNU General Public License, Version 2 any  
+later version published by the Free Software Foundation. 
+ 
+.PP 
+On Debian systems, the complete text of the GNU General Public 
+License can be found in /usr/share/common-licenses/GPL. 
+ 
+.\" created by instant / docbook-to-man, Fri 12 Mar 2004, 05:58