@- Fix behaviour of strtok. Bug 13866 (jmoore)
# I have brought the behaviour of strtok into line with how the
# libc strtok's behave. currently given
# <string1><token><string2><token><token>string>
# three recursive calls to strtok returns <string1>. <string2>, <token><string3>
# it now returns <string1>, <string2>, <string3>. (there was some
# debate in #php.bugs if it should return <string1>, <string2>, false, <string3>
# but php's strtok now behaves the same way as the libc version.