Trailing slashes may be followed by 'index.php'

[Kaz Nishimura]

If permalink is configured with a trailing slash, index.php may be appended, probably by the web application server. This case must be handled properly.

[Kaz Nishimura]

Added code to chop automatically added 'index.php' to resolve issue #2.

→ <<cset 96e3e116dcc1>>