Changed the term rename to alias etc.

Docker-DCO-1.1-Signed-off-by: William Henry <whenry@redhat.com> (github: ipbabble)

 Changes to be committed:
	modified:   contrib/man/md/docker-tag.1.md

contrib/man/md/docker-tag.1.md

@@ -9,12 +9,12 @@ docker-tag - Tag an image in the repository
 IMAGE [REGISTRYHOST/][USERNAME/]NAME[:TAG]
 
 # DESCRIPTION
-This will rename an image in the repository. This refers to the
+This will give a new alias to an image in the repository. This refers to the
 entire image name including the optional TAG after the ':'. 
 
 # "OPTIONS"
 **-f**, **--force**=*true*|*false*
-   When set to true, force the tag name. The default is *false*.
+   When set to true, force the alias. The default is *false*.
 
 **REGISTRYHOST**
    The hostname of the registry if required. This may also include the port
@@ -33,9 +33,9 @@ Note that here TAG is a part of the overall name or "tag".
 
 # EXAMPLES
 
-## Tagging an image
+## Giving an image a new alias
 
-Here is an example of renaming an image (e.g. 0e5574283393) as "httpd" and 
+Here is an example of aliasing an image (e.g. 0e5574283393) as "httpd" and 
 tagging it into the "fedora" repository with "version1.0":
 
     docker tag 0e5574283393 fedora/httpd:version1.0