* xmlrpcs.inc, xmlrpcs.inc: remove code that was left for compatibility with php...

* xmlrpcs.inc, xmlrpcs.inc: remove code that was left for compatibility with php 4; use __METHOD__ constant for error messages instead of hardcoded values
* xmlrpcs.inc: catch exceptions thrown during execution of invoked methods; check for $_SERVER having been disabled via php.ini and log an error if so
* server.php, testsuite.php: add a new test and server method for exception catching in the server

git-svn-id: https://svn.code.sf.net/p/phpxmlrpc/code/trunk/xmlrpc@55 013ecfd8-0664-425d-a759-9c98391dc3f9