default settings

[jeffkaufman]

mod_pagespeed installs a default config file, but we just give people a few lines to paste into their existing config. Occasionally there are changes in mod_pagespeed where in order to keep existing users from having mod_pagespeed change behavior out from under them a new option defaulted to "off" but was enabled in the config. There are two of these:

ModPagespeedFileCacheInodeLimit 500000
ModPagespeedAvoidRenamingIntrospectiveJavascript on

we should make these be defaults in our code.

[jeffkaufman]

For the inode limit, see the todo on system_rewrite_options.cc:105

[jeffkaufman]

Fixed by #366, released in 1.5.27.3