Added wfTransactionalTimeLimit() method and applied it
- Potentially long running POST requests often use multiple transactions, talk to multiple services, or defer updates. Try to make sure they have a chance to complete all of the work. WMF already sets ignore_user_abort() across the board in config, but this applies it to key spots for all installs, in addition to bumping the time limit.
- Eventually this can lower the need for high overall time limits.