#015267: Solr Handler should allow to specify character encoding

The default installation of tomcat (not only in Debian) uses ISO-8859-1 as default encoding.[1] eZ Components uses utf-8, when it assumes an encoding.
Every user of ezcSearch therefor needs to change the default configuration of Tomcat to utf-8.

An alternative would be to allow to send the character encoding in the Solr Handler and set it to utf-8 as default. This can be done by sending a Content-Type: text/html; charset=utf-8 header.

To avoid too many parameters, one could extract the HTTP related methods from solr handler into a separate object, that could be configured.

[1] http://wiki.apache.org/tomcat/FAQ/CharacterEncoding

Operating System:
PHP Version: (please be specific, like '4.4.3' or '5.1.5')
Database and version:
Browser (and version):