bitcoin/bitcoin — pull request #2776 by jgarzik (2013-06-18 18:25:46+00:00)
Title: RPC: keypoolrefill now permits optional size parameter, to bump keypool

Users are now permitted to increase the keypool size at runtime.

Ideally they will update their config and restart, but that is not always feasible. This enables the admin to login, refill the keypool to handle heavy traffic needs immediately, without downtime.

However, the keypool target size returns to its configuration-specified value at restart, as expected.