man pages: Lowercase name for syntax highlighting

When the man pages' reST is built using Sphinx, “bash” must be used
instead of “Bash”. Pandoc works with both.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

man/ganeti-listrunner.rst

@@ -88,13 +88,13 @@ EXAMPLE
 
 Run a command on a list of hosts:
 
-.. code-block:: Bash
+.. code-block:: bash
 
   listrunner -l logdir -c "uname -a" -h host1,host2,host3
 
 Upload a script, some auxiliary files and run the script:
 
-.. code-block:: Bash
+.. code-block:: bash
 
   listrunner -l logdir -x runme.sh \
     -a seed.dat -a golden.dat \

man/ganeti-os-interface.rst

@@ -226,7 +226,7 @@ fails.
 For the ``dhcp`` parameter given as example above, a verification
 script could be:
 
-.. code-block:: Bash
+.. code-block:: bash
 
     #!/bin/sh
 
@@ -342,7 +342,7 @@ The rename script has been added. If you don't want to do any
 changes on the instances after a rename, you can migrate the OS
 definition to version 5 by creating the rename script simply as:
 
-.. code-block:: Bash
+.. code-block:: bash
 
     #!/bin/sh
 

man/ganeti-watcher.rst

@@ -81,7 +81,7 @@ In some cases, it's even desirable to reset the watcher state, for
 example after maintenance actions, or when you want to simulate the
 reboot of all nodes, so in this case, you can remove all state files:
 
-.. code-block:: Bash
+.. code-block:: bash
 
     rm -f @LOCALSTATEDIR@/lib/ganeti/watcher.*.data
     rm -f @LOCALSTATEDIR@/lib/ganeti/watcher.*.instance-status

man/gnt-instance.rst

@@ -571,7 +571,7 @@ cpu\_mask
 
     Example:
 
-    .. code-block:: Bash
+    .. code-block:: bash
 
       # Map the entire instance to CPUs 0-2
       gnt-instance modify -H cpu_mask=0-2 my-inst