mumble link support

The coordinate calculation was adopted from Warsow's mumble patch.

Makefile

@@ -125,6 +125,10 @@ ifndef USE_CODEC_VORBIS
 USE_CODEC_VORBIS=0
 endif
 
+ifndef USE_MUMBLE
+USE_MUMBLE=1
+endif
+
 ifndef USE_LOCAL_HEADERS
 USE_LOCAL_HEADERS=1
 endif
@@ -232,6 +236,10 @@ ifeq ($(PLATFORM),linux)
     BASE_CFLAGS += -DUSE_CODEC_VORBIS
   endif
 
+  ifeq ($(USE_MUMBLE),1)
+    BASE_CFLAGS += -DUSE_MUMBLE
+  endif
+
   OPTIMIZE = -O3 -ffast-math -funroll-loops -fomit-frame-pointer
 
   ifeq ($(ARCH),x86_64)
@@ -283,6 +291,10 @@ ifeq ($(PLATFORM),linux)
     CLIENT_LDFLAGS += -lvorbisfile -lvorbis -logg
   endif
 
+  ifeq ($(USE_MUMBLE),1)
+    CLIENT_LDFLAGS += -lrt
+  endif
+
   ifeq ($(ARCH),i386)
     # linux32 make ...
     BASE_CFLAGS += -m32
@@ -346,6 +358,10 @@ ifeq ($(PLATFORM),darwin)
     CLIENT_LDFLAGS += -lvorbisfile -lvorbis -logg
   endif
 
+  ifeq ($(USE_MUMBLE),1)
+    BASE_CFLAGS += -DUSE_MUMBLE
+  endif
+
   BASE_CFLAGS += -D_THREAD_SAFE=1
 
   ifeq ($(USE_LOCAL_HEADERS),1)
@@ -412,6 +428,10 @@ ifeq ($(PLATFORM),mingw32)
     BASE_CFLAGS += -DUSE_CODEC_VORBIS
   endif
 
+  ifeq ($(USE_MUMBLE),1)
+    BASE_CFLAGS += -DUSE_MUMBLE
+  endif
+
   OPTIMIZE = -O3 -march=i586 -fno-omit-frame-pointer -ffast-math \
     -falign-loops=2 -funroll-loops -falign-jumps=2 -falign-functions=2 \
     -fstrength-reduce
@@ -497,6 +517,10 @@ ifeq ($(PLATFORM),freebsd)
     BASE_CFLAGS += -DUSE_CODEC_VORBIS
   endif
 
+  ifeq ($(USE_MUMBLE),1)
+    BASE_CFLAGS += -DUSE_MUMBLE
+  endif
+
   ifeq ($(ARCH),axp)
     BASE_CFLAGS += -DNO_VM_COMPILED
     RELEASE_CFLAGS=$(BASE_CFLAGS) -DNDEBUG -O3 -ffast-math -funroll-loops \
@@ -564,6 +588,10 @@ ifeq ($(PLATFORM),openbsd)
     BASE_CFLAGS += -DUSE_CODEC_VORBIS
   endif
 
+  ifeq ($(USE_MUMBLE),1)
+    BASE_CFLAGS += -DUSE_MUMBLE
+  endif
+
   BASE_CFLAGS += -DNO_VM_COMPILED -I/usr/X11R6/include -I/usr/local/include
   RELEASE_CFLAGS=$(BASE_CFLAGS) -DNDEBUG -O3 \
     -march=pentium -fomit-frame-pointer -pipe -ffast-math \
@@ -1339,6 +1367,11 @@ else
     $(B)/client/sys_unix.o
 endif
 
+ifeq ($(USE_MUMBLE),1)
+  Q3OBJ += \
+    $(B)/client/libmumblelink.o
+endif
+
 Q3POBJ += \
   $(B)/client/sdl_glimp.o