max-open-files might have been a nice configuration option once, but (1) we've never advertised it in the gui apps, and (2) the crazy cases are causing more trouble than this feature is worth. It's more complicated now after #4164 -- see #4294, #4311, and this ticket.
querying gconf2 each time the curl callack function is called is expensive, so query it once -- then again later, if the proxy settings change -- and remember the values in a local struct.
This is partially to address #4145 "Downloads stuck at 100%" by refactoring the bitset, bitfield, and tr_completion; however, the ripple effect is larger than usual so things may get worse in the short term before getting better.
livings124: to fix the mac build, remove bitset.[ch] from xcode
This is a little overlapping since the utp code can be closed more-or-less immediately, but the udp manager needs to stay open in order to process the udp tracker connection requests before sending out event=stopped. Moreover DNS resolver can be shut down after the UDP tracker is shutdown.
We can stop local peer discovery immediately during shutdown, but need to leave the announcer running for the event=stopped messages. So it doesn't make sense to keep them on the same periodic timer.
During shutdown, we can stop DHT almost immediately, but need to leave the announcer running for the DHT tracker event=stopped messages. So it doesn't make sense to keep them on the same periodic timer.
Since we're using a single UDP socket to implement multiple uTP sockets,
and since we're not always timely in servicing an incoming UDP packet,
it's important to use a large receive buffer. The send buffer is probably
less critical, we increase it nonetheless.
User jusid reports prefetch causes load on his NMT to jump from <1 to 3-4. He requests a way to disable prefetch, and suggests that prefetch be disabled by default on lightweight builds. This commit adds a new settings.json key, "prefetch-enabled", which defaults to "true" on standard builds and "false" when compiled with --enable-lightweight.
TR_EMBEDDED has been around for awhile, but few (any?) repackagers are aware of it. If it was "advertised" through a configure-time argument, and in the status messages at the end of the configure script, more repackagers would be aware of it.
The Berne Convention says that the copyright year is moot, so instead of adding another year to each file as in previous years, I've removed the year altogether from the source code comments in libtransmission, gtk, qt, utils, daemon, and cli.
Juliusz's copyright notice in tr-dht and Johannes' copyright notice in tr-lpd have been left alone; it didn't seem appropriate to modify them.
When I first implemented this code, I made the preference hidden --
unless you set it yourself, it will not appear in the sttings file.
Now that it's been documented and advertised, make it visible.
