fix a lot of issues on psogc; add proxy module

- $ann implemented
- concurrency removed; server is now single-threaded, event-driven and much more stable
- rare seed is no longer the game id; ids are sequential from server startup so they weren't random at all before
- supports dropping privileges; now you can run it as root so it can open a sockets on low ports, then it will switch to the given user before serving any traffic
- newserv now behaves like a proxy if you run it with the --proxy-destination=<IP_OR_HOSTNAME> argument; there's also an (invisible) shell in this mode where you can inject commands to the server or client. e.g. it can always be christmas in the lobby if you do `sc DA 01 00 00`
- increased the mtu on PSODolphinConfig's tap0 configuration; this seems to make the connection more stable
- fixed some uninitialized memory bugs
- the shell is now event-driven and now uses libevent too; unfortunately this means readline doesn't work anymore (no history and vim-like shortcuts)
- made network command display consistent for input vs. output (the header appears in both cases now)
- fixed bugs in some subcommand handling (the BB logic was being applied to non-BB clients erroneously, causing most item drops not to work at all)
- fixed player tags in the short lobby data struct. unclear if this was actually a problem but it was inconsistent with other servers
- fixed "unused" field in game join command (actually it appears to be disable_udp and should be 1, not 0)
- cleaned up Server abstraction a bit
- rewrote some text functions; asan was complaining about the built-in ones for some reason
- added an optional welcome message

Makefile

@@ -2,19 +2,18 @@ OBJECTS=FileContentsCache.o Menu.o PSOProtocol.o Client.o Lobby.o \
 	ServerState.o Server.o License.o PSOEncryption.o Player.o SendCommands.o \
 	ChatCommands.o ReceiveSubcommands.o ReceiveCommands.o Version.o Items.o \
 	LevelTable.o Compression.o Quest.o RareItemSet.o Map.o NetworkAddresses.o \
-	Text.o DNSServer.o Shell.o Main.o
+	Text.o DNSServer.o ProxyServer.o Shell.o ServerShell.o ProxyShell.o Main.o
 CXX=g++
 CXXFLAGS=-I/opt/local/include -I/usr/local/include -std=c++14 -g -DHAVE_INTTYPES_H -DHAVE_NETINET_IN_H -Wall -Werror
-LDFLAGS=-L/opt/local/lib -L/usr/local/lib -std=c++14 -levent -levent_pthreads -lphosg -lpthread -lreadline
-EXECUTABLE=newserv
+LDFLAGS=-L/opt/local/lib -L/usr/local/lib -std=c++14 -levent -levent_pthreads -lphosg -lpthread
 
-all: $(EXECUTABLE)
+all: newserv
 
-$(EXECUTABLE): $(OBJECTS)
-	$(CXX) $(OBJECTS) $(LDFLAGS) -o $(EXECUTABLE)
+newserv: $(OBJECTS)
+	$(CXX) $(OBJECTS) $(LDFLAGS) -o newserv
 
 clean:
 	find . -name \*.o -delete
-	rm -rf *.dSYM $(EXECUTABLE) gmon.out
+	rm -rf *.dSYM newserv newserv-dns gmon.out
 
 .PHONY: clean test