fix test based showcase.

src/zc/buildout/networkcache.txt

@@ -6,26 +6,37 @@ Note: We are in process of preparing docs. This is only showcase.
    >>> write(sample_buildout, 'buildout.cfg',
    ... '''
    ... [buildout]
-   ... sha-cache = http://127.0.0.1:1/
-   ... sha-dir = http://127.0.0.1:2/
+   ...
+   ... networkcache-section = networkcache
    ... find-links = %(link_server)s
    ... parts = eggs
    ...
    ... [eggs]
    ... recipe = zc.recipe.egg:eggs
    ... eggs = demo ==0.2
+   ...
+   ... [networkcache]
+   ... download-cache-url = http://127.0.0.1:1/
+   ... download-dir-url = http://127.0.0.1:1/
+   ... upload-cache-url = http://127.0.0.1:1/
+   ... upload-dir-url = http://127.0.0.1:1/
    ... ''' % globals())
 
    >>> print system(buildout)
+   Networkcache enabled.
+   Networkcache download cache: 'http://127.0.0.1:1/', directory 'http://127.0.0.1:1/'
+   Networkcache upload cache: 'http://127.0.0.1:1/', directory 'http://127.0.0.1:1/'
    Installing eggs.
    Getting distribution for 'demo==0.2'.
    Downloading demo-0.2-py2.7.egg from network cache.
-   Fail to download from network cache demo-0.2-py2.7.egg: [Errno 111] Connection refused
+   Failed to download from network cache demo-0.2-py2.7.egg: [Errno 111] Connection refused
+   Uploading http://localhost/demo-0.2-py2.7.egg into network cache.
    Fail to upload file. [Errno 111] Connection refused
    Got demo 0.2.
    Getting distribution for 'demoneeded'.
    Downloading demoneeded-1.2c1.zip from network cache.
-   Fail to download from network cache demoneeded-1.2c1.zip: [Errno 111] Connection refused
+   Failed to download from network cache demoneeded-1.2c1.zip: [Errno 111] Connection refused
+   Uploading http://localhost/demoneeded-1.2c1.zip into network cache.
    Fail to upload file. [Errno 111] Connection refused
    Got demoneeded 1.2c1.
    <BLANKLINE>
@@ -36,10 +47,14 @@ Note: We are in process of preparing docs. This is only showcase.
    ...     remove(sample_buildout, 'eggs', egg)
 
    >>> print system(buildout)
+   Networkcache enabled.
+   Networkcache download cache: 'http://127.0.0.1:1/', directory 'http://127.0.0.1:1/'
+   Networkcache upload cache: 'http://127.0.0.1:1/', directory 'http://127.0.0.1:1/'
    Updating eggs.
    Getting distribution for 'demoneeded'.
    Downloading demoneeded-1.2c1.zip from network cache.
-   Fail to download from network cache demoneeded-1.2c1.zip: [Errno 111] Connection refused
+   Failed to download from network cache demoneeded-1.2c1.zip: [Errno 111] Connection refused
+   Uploading http://localhost/demoneeded-1.2c1.zip into network cache.
    Fail to upload file. [Errno 111] Connection refused
    Got demoneeded 1.2c1.
    <BLANKLINE>