Merge remote-tracking branch 'origin/feat/max-alloc' into dev

src/client/usage.c

@@ -30,6 +30,7 @@ void print_usage(void) {
   printf("  --include-from <file> Read include patterns from file\n");
   printf("  --max-size <n>      Skip files larger than n bytes\n");
   printf("  --min-size <n>      Skip files smaller than n bytes\n");
+  printf("  --max-alloc <SIZE>  Maximum single allocation (default: 1G)\n");
   printf("  --incremental       Skip files unchanged since last transfer\n");
   printf("  --size-only         Skip incremental files matching in size, ignoring mtime\n");
   printf("  -I, --ignore-times  Transfer files even when size and mtime match\n");