Remove dollars from system call support symbols

libc/sock/getsockopt-nt.c

@@ -23,11 +23,11 @@
 #include "libc/sock/yoink.inc"
 #include "libc/sysv/errfuns.h"
 
-textwindows int getsockopt$nt(struct Fd *fd, int level, int optname,
+textwindows int sys_getsockopt_nt(struct Fd *fd, int level, int optname,
                               void *out_opt_optval, uint32_t *out_optlen) {
   /* TODO(jart): Use WSAIoctl? */
   assert(fd->kind == kFdSocket);
-  if (__getsockopt$nt(fd->handle, level, optname, out_opt_optval, out_optlen) !=
+  if (__sys_getsockopt_nt(fd->handle, level, optname, out_opt_optval, out_optlen) !=
       -1) {
     return 0;
   } else {