. session_start() accepts all INI settings as array. e.g. ['cache_limiter'=>'private']
sets session.cache_limiter=private. It also supports 'read_and_close' which closes
session data immediately after read data.
- . Save handlers accpets validate_sid(), update_timestamp() which validates session
+ . Save handler accepts validate_sid(), update_timestamp() which validates session
ID existence, updates timestamp of session data. Compatibility of old user defined
save handler is retained.
. SessionUpdateTimestampHandlerInterface is added. validateSid(), updateTimestamp()