OSX: Fix Server Browser Crash

Crash because strlcpy destination and source were the same. The copy is
unnecessary, we only need to keep a pointer to track the start of the name
and move the pointer, instead of moving all the bytes in the name.

--

Process:         ezquake-darwin-x86_64 [13675]

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000

Application Specific Information:
detected source and destination buffer overlap

Thread 9 Crashed:
0   libsystem_kernel.dylib        	0x00007fff941af866 __pthread_kill + 10
1   libsystem_pthread.dylib       	0x00007fff8c43935c pthread_kill + 92
2   libsystem_c.dylib             	0x00007fff8b615bba abort + 125
3   libsystem_c.dylib             	0x00007fff8b615d31 abort_report_np + 181
4   libsystem_c.dylib             	0x00007fff8b6398c5 __chk_fail + 48
5   libsystem_c.dylib             	0x00007fff8b6398d5 __chk_fail_overlap + 16
6   libsystem_c.dylib             	0x00007fff8b6398f7 __chk_overlap + 34
7   libsystem_c.dylib             	0x00007fff8b639973 __strlcpy_chk + 68
8   ezquake-darwin                	0x000000010ce328bf Parse_Serverinfo + 2479 (EX_browser_net.c:233)
9   ezquake-darwin                	0x000000010ce33639 GetServerInfosProc + 1401 (EX_browser_net.c:516)
10  ezquake-darwin                	0x000000010ce33932 GetServerPingsAndInfosProc + 146 (EX_browser_net.c:593)
11  libSDL2-2.0.0.dylib           	0x0000000111ba9649 SDL_RunThread + 64
12  libSDL2-2.0.0.dylib           	0x0000000111bdfd15 RunThread + 9
13  libsystem_pthread.dylib       	0x00007fff8c438899 _pthread_body + 138
14  libsystem_pthread.dylib       	0x00007fff8c43872a _pthread_start + 137
15  libsystem_pthread.dylib       	0x00007fff8c43cfc9 thread_start + 13