Refactor storing of measured_bw versus Unmeasured=1.

This patch moves the measured_bw field and the has_measured_bw field
into vote_routerstatus_t, since only votes have 'Measured=XX' set on
their weight line.

I also added a new bw_is_unmeasured flag to routerstatus_t to
represent the Unmeasured=1 flag on a w line.  Previously, I was using
has_measured_bw for this, which was quite incorrect: has_measured_bw
means that the measured_bw field is set, and it's probably a mistake
to have it serve double duty as meaning that 'baandwidth' represents a
measured value.

While making this change,I also found a harmless but stupid bug in
dirserv_read_measured_bandwidths: It assumes that it's getting a
smartlist of routerstatus_t, when really it's getting a smartlist of
vote_routerstatus_t.  C's struct layout rules mean that we could never
actually get an error because of that, but it's still quite incorrect.
I fixed that, and in the process needed to add two more sorting and
searching helpers.

Finally, I made the Unmeasured=1 flag get parsed.  We don't use it for
anything yet, but someday we might.

This isn't complete yet -- the new 2286 unit test doesn't build.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/or/dirserv.h b/src/or/dirserv.h
index add09f44a3..0caf55f830 100644
--- a/src/or/dirserv.h
+++ b/src/or/dirserv.h
@@ -131,7 +131,8 @@ size_t dirserv_estimate_microdesc_size(const smartlist_t *fps, int compressed);
 
 int routerstatus_format_entry(char *buf, size_t buf_len,
                               const routerstatus_t *rs, const char *platform,
-                              routerstatus_format_type_t format);
+                              routerstatus_format_type_t format,
+                              const vote_routerstatus_t *vrs);
 void dirserv_free_all(void);
 void cached_dir_decref(cached_dir_t *d);
 cached_dir_t *new_cached_dir(char *s, time_t published);