Opened up rbyd testing for all geometries, and fixed related bugs

- Caching is still presenting issues with the new requirements for
  rbyd trees, in this case the default bd, with 64 byte progs, revealed
  and issue where rcache could become outdated when reading from disk
  while ignoring what's in the pcache.

  It assumes the pcache will always override the rcache, but this is not
  true after pcache is flushed.

  This didn't happen before as the rcache and pcache don't
  interact while writing in the previous implementation. Because of
  these new requirements the caching system probably deserves a
  rework...

- The quick tests for sublinear space utilization don't work when
  prog_size is > a byte, fortunately we should always have NOR-like
  geometry under test, so we can limit these asserts to NOR-like
  geometry.

- Lots of problems fitting these tests into 512-byte block_size
  geometries, which is a bit concerning. This may be a larger change
  from the previous implementation than expected. This may deserve more
  scrutiny at small block sizes to see how things fit, since the
  sublinear space utilization doesn't really kick in at this scale...

  On the other hand it may just be that these tests are too aggressive
  for 512-byte block sizes, since they don't yet do compaction, which
  should help with padding/crc overhead...

lfs.h

@@ -84,7 +84,7 @@ enum lfs_error {
     LFS_ERR_NOMEM       = -12,  // No more memory available
     LFS_ERR_NOATTR      = -61,  // No data/attr available
     LFS_ERR_NAMETOOLONG = -36,  // File name too long
-    LFS_ERR_RANGE       = -7,   // Result out of range
+    LFS_ERR_RANGE       = -34,  // Result out of range
     // TODO should all overflow errors actually be corrupt errors?
     LFS_ERR_OVERFLOW    = -75,  // Value too large for defined data type
 };