Fix serverinfo overflow - reduce version cvar

Mitigate the serverinfo overflow issue by reducing the version cvar
length which is somewhat longer than the official engine by 33 chars.

- Abbreviate PRODUCT_NAME to match official (will affect pid filenames)
- Remove redundant product name from makeFile VERSION
- Reduce git info to rev alone (commit date can be inferred from hash)

Mitigates mickael9#30

Makefile

@@ -89,7 +89,7 @@ endif
 export CROSS_COMPILING
 
 ifndef VERSION
-VERSION=ioq3urt-mickael9
+VERSION=m9
 endif
 
 ifndef CLIENTBIN
@@ -288,9 +288,9 @@ endif
 # Add git version info
 USE_GIT=
 ifeq ($(wildcard .git),.git)
-  GIT_REV=$(shell git show -s --pretty=format:%h-%ad --date=short)
+  GIT_REV=$(shell git describe --always)
   ifneq ($(GIT_REV),)
-    VERSION:=$(VERSION)_GIT_$(GIT_REV)
+    VERSION:=$(VERSION)-$(GIT_REV)
     USE_GIT=1
   endif
 endif

code/qcommon/q_shared.h

@@ -26,7 +26,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 // q_shared.h -- included first by ALL program modules.
 // A user mod should never modify this file
 
-#define PRODUCT_NAME				"ioQuake3-UrT"
+#define PRODUCT_NAME				"ioQ3-UrT"
 #define BASEGAME					"q3ut4"
 #define CLIENT_WINDOW_TITLE		"UrbanTerror"
 #define CLIENT_WINDOW_MIN_TITLE	"UrbanTerror"