control: Add GETINFO command for the shared random values

Add the "sr/current" and "sr/previous" keys for the GETINFO command in order
to get through the control port the shared random values from the consensus.

Closes #19925

Signed-off-by: David Goulet <dgoulet@torproject.org>

src/or/shared_random.h

@@ -129,6 +129,10 @@ const char *sr_commit_get_rsa_fpr(const sr_commit_t *commit)
 void sr_compute_srv(void);
 sr_commit_t *sr_generate_our_commit(time_t timestamp,
                                     const authority_cert_t *my_rsa_cert);
+
+char *sr_get_current_for_control(void);
+char *sr_get_previous_for_control(void);
+
 #ifdef SHARED_RANDOM_PRIVATE
 
 /* Encode */