Bug 9247 - Add two more usage examples to the manpage for koha-mysql

Bug 9247 - Add two more usage examples to the manpage for koha-mysql

It might not be immediately obvious that it is possible to send
SQL queries "directly" to the koha-mysql command, or that files
from mysqldump can be loaded with it. This patch adds these as
"example usage" to the man page for koha-mysql.

To test:

Run these commands and look at the formatted man page:
$ xsltproc /usr/share/xml/docbook/stylesheet/docbook-xsl/manpages/docbook.xsl \
  debian/docs/koha-mysql.xml
$ man -l koha-mysql.8

Make sure this test passes:
$ prove -v xt/verify-debian-docbook.t

This patch also corrects a couple places where "Koha" was written as "koha".

Signed-off-by: Mirko Tietgen <mirko@abunchofthings.net>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Test plan, all tests and QA script pass.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>