d62ec56098
* Servers can be assigned different weights to account for
differing capacity. New -W command-line option. New penctl
commands:
server S weight W (assign weight to server)
weight (use weight for server selection)
no weight (do not use weight for server selection)
Cleaned up the logic in add_client so the weighted server
selection can be used without client tracking.
* Some performance enhancing changes:
New variable connections_used remembers the number of used
slots in conns[]. It is incremented by store_conn and
decremented by close_conn. This allows the main loop to
only accept new connections if there are empty slots in
conns[], which is much better than accepting the connection
only to immediately close it because we can't handle it.
New variable connections_last remembers the last used slot
in conns[]. This allows us to scan for empty slots much faster
in store_conn when there are many simultaneous connections.
* Documented the procedure to change FD_SETSIZE on Linux
in INSTALL.
* Documented the include command in the penctl manpage.
* Fixed SSL so it works in nonblocking mode, except that
it doesn't work anyway.
Moved listenfd and ctrlfd out of main.
* Highly experimental SSL code in pen.c. Updated manpage
with the new options. Added https example to HOWTO.
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