现在想使用sed命令，在resin的配置文件resin.conf最低的
</host>
</http-server>
之间插入新的虚拟机配置文件信息，内容如下：
<host id="www.ccc.com">
<error-log id="/var/web/jsp/www.ccc.com/logs/error.log"/>
<stdout-log href="/var/web/jsp/www.ccc.com/logs/stdout.log" rollover-period="2W"/>
<stderr-log href="/var/web/jsp/www.ccc.com/logs/stderr.log" rollover-period="2W"/>
<web-app id="/" app-dir="/var/web/jsp/www.ccc.com/">
<classpath id="WEB-INF/classes" source="WEB-INF/classes" compile="true"/>
<session-config>
<session-max>4096</session-max>
<session-timeout>30</session-timeout>
<enable-cookies>true</enable-cookies>
<enable-url-rewriting>true</enable-url-rewriting>
<always-save-session>true</always-save-session>
<file-store>WEB-INF/sessions</file-store>
</session-config>
</web-app>
</host>
不知道该如何实现，在这里请教各位使用sed命令的高手看有没有好的办法能解决。可以通过写脚本，或者用其他的命令来实现。
注：下面虚拟机配置文件当中有空行及tab键的信息的。
<caucho.com>
<http-server>
<host id="www.aaaa.com">
<error-log id="/var/web/jsp/www.aaaa.com/logs/error.log"/>
<stdout-log href="/var/web/jsp/www.aaaa.com/logs/stdout.log" rollover-period="2W"/>
<stderr-log href="/var/web/jsp/www.aaaa.com/logs/stderr.log" rollover-period="2W"/>
<web-app id="/" app-dir="/var/web/jsp/www.aaaa.com/">
<classpath id="WEB-INF/classes" source="WEB-INF/classes" compile="true"/>
<session-config>
<session-max>4096</session-max>
<session-timeout>30</session-timeout>
<enable-cookies>true</enable-cookies>
<enable-url-rewriting>true</enable-url-rewriting>
<always-save-session>true</always-save-session>
<file-store>WEB-INF/sessions</file-store>
</session-config>
</web-app>
</host>
<host id="www.bbb.com">
<error-log id="/var/web/jsp/www.bbb.com/logs/error.log"/>
<stdout-log href="/var/web/jsp/www.bbb.com/logs/stdout.log" rollover-period="2W"/>
<stderr-log href="/var/web/jsp/www.bbb.com/logs/stderr.log" rollover-period="2W"/>
<web-app id="/" app-dir="/var/web/jsp/www.bbb.com/">
<classpath id="WEB-INF/classes" source="WEB-INF/classes" compile="true"/>
<session-config>
<session-max>4096</session-max>
<session-timeout>30</session-timeout>
<enable-cookies>true</enable-cookies>
<enable-url-rewriting>true</enable-url-rewriting>
<always-save-session>true</always-save-session>
<file-store>WEB-INF/sessions</file-store>
</session-config>
</web-app>
</host>
</http-server>
</caucho.com>
