Rename callbacks.c -> sudoers_cb.c.

MANIFEST

@@ -618,7 +618,6 @@ plugins/sudoers/b64_encode.c
 plugins/sudoers/boottime.c
 plugins/sudoers/bsm_audit.c
 plugins/sudoers/bsm_audit.h
-plugins/sudoers/callbacks.c
 plugins/sudoers/canon_path.c
 plugins/sudoers/check.c
 plugins/sudoers/check_aliases.c
@@ -1169,6 +1168,7 @@ plugins/sudoers/sudoers.c
 plugins/sudoers/sudoers.exp
 plugins/sudoers/sudoers.h
 plugins/sudoers/sudoers.in
+plugins/sudoers/sudoers_cb.c
 plugins/sudoers/sudoers_ctx_free.c
 plugins/sudoers/sudoers_debug.c
 plugins/sudoers/sudoers_debug.h

plugins/sudoers/sudoers.h

@@ -431,7 +431,7 @@ void register_env_file(void * (*ef_open)(const char *), void (*ef_close)(void *)
 /* env_pattern.c */
 bool matches_env_pattern(const char *pattern, const char *var, bool *full_match);
 
-/* callbacks.c */
+/* sudoers_cb.c */
 void set_callbacks(void);
 bool cb_log_input(struct sudoers_context *ctx, const char *file, int line, int column, const union sudo_defs_val *sd_un, int op);
 bool cb_log_output(struct sudoers_context *ctx, const char *file, int line, int column, const union sudo_defs_val *sd_un, int op);