typo in -help reverge-geo lookups

There is  a small typo in help :

`ot-recorder -h`

`  --norevgeo		-G     disable ghash to reverge-geo lookups`

```
find . -type f | xargs grep reverge
./ocat.c:	printf("  --norevgeo		-G      disable ghash to reverge-geo lookups\n");
./recorder.c:	printf("  --norevgeo		-G     disable ghash to reverge-geo lookups\n");
```

i think this should read rever**s**e-geo