Rename the PHP function boolval to boolvalEx because PHP introduces this method in version 5.5. The OMV boolval works different than the PHP function, thus the function MUST be renamed to do not break the code. The OMV original boolval function is set deprecated and will be removed in Debian Jessie (OMV 2.0 or 8.0). Until then it will redirect function calls to boolvalEx.

git-svn-id: svn://svn.code.sf.net/p/openmediavault/code@1366 3c3d7b80-5828-415e-9f61-280b98178fff