Author: Paul Holden
MDL-29693 report_configlog: implement report search filtering.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=fdd3ccaf07e1a660fb042e020859da8f49cdb8df
http://github.com/moodle/moodle/commit/fdd3ccaf07e1a660fb042e020859da8f49cdb8df
+ 3.8 en [datefrom,report_configlog]
+ 3.8 en [dateto,report_configlog]
+ 3.8 en [user,report_configlog]
+ 3.8 en [user_help,report_configlog]
+ 3.8 en [value,report_configlog]
+ 3.8 en [value_help,report_configlog]