test(parity): option-wave rsync differentials + docs (109/21/26)

- tests/integration/test_option_parity.py: bwlimit parse matrix + throttle
  rate, --info flist/name/nonreg/del(dry+real+itemize)/remove, real-setpriv
  --ignore-errors, rsync-daemon -M forwarding evidence, filter protect/risk
  destination-only divergence pin.
- RSYNC_COMPAT.md: tally 109/21/26; --bwlimit and --ignore-errors -> Parity,
  --filter and -M -> Divergent with differential rationale, --info residual
  narrowed to the categories with no client-observable event.
- HANDOFF/README: protocol 2.27.0, option-wave summary.

src/client/change_list.c

@@ -70,10 +70,9 @@ static bool strbuf_append(StrBuf* buf, const char* text) {
 }
 
 bool change_list_enabled(const Config* config) {
-  return config != NULL &&
-         (config->itemize_changes || config->out_format != NULL ||
-          (config->log_file != NULL && config->log_file_format != NULL) ||
-          (config->info_level & LOG_INFO_NAME) != 0);
+  return config != NULL && (config->itemize_changes || config->out_format != NULL ||
+                            (config->log_file != NULL && config->log_file_format != NULL) ||
+                            (config->info_level & LOG_INFO_NAME) != 0);
 }
 
 /* ---- Itemize code ---- */

src/client/client_cli.c

@@ -501,7 +501,9 @@ static bool is_accepted_debug_category(const char* name) {
 
 static bool is_accepted_info_category(const char* name) {
   static const char* const categories[] = {
-      "mount", "syms", "symsafe",
+      "mount",
+      "syms",
+      "symsafe",
   };
   for (size_t i = 0; i < sizeof(categories) / sizeof(categories[0]); i++) {
     if (strcmp(name, categories[i]) == 0)
@@ -1846,9 +1848,9 @@ static int parse_bwlimit_value(const char* value, unsigned long long* bytes_per_
   long long mult;
   while (*arg >= '0' && *arg <= '9')
     arg++;
-  if (*arg != '\0' &&
-      (*arg == '.' || *arg == localeconv()->decimal_point[0]))
-    for (arg++; *arg >= '0' && *arg <= '9'; arg++) {}
+  if (*arg != '\0' && (*arg == '.' || *arg == localeconv()->decimal_point[0]))
+    for (arg++; *arg >= '0' && *arg <= '9'; arg++) {
+    }
 
   char suffix = *arg && *arg != '+' && *arg != '-' ? *arg++ : 'K';
   switch (suffix) {
@@ -1932,8 +1934,7 @@ static int set_bwlimit_option(const char* value) {
   if (parse_bwlimit_value(value, &bytes_per_sec) != 0)
     return -1;
   io_set_bwlimit(bytes_per_sec);
-  log_info_message(LOG_INFO_MISC, "Set bandwidth limit to %llu KB/s",
-                   bytes_per_sec / 1024);
+  log_info_message(LOG_INFO_MISC, "Set bandwidth limit to %llu KB/s", bytes_per_sec / 1024);
   return 0;
 }
 
@@ -2651,10 +2652,9 @@ static int cli_finalize_config(Config* config, bool verbose, bool no_delta, bool
   /* --info=del on a real --delete run asks the receiver to report the paths it
      actually removed; the report rides the STATUS_STATS path list, so the wire
      stats frame must be negotiated too. */
-  config->report_deletes =
-      config->use_delete && !config->dry_run &&
-      ((config->info_level & LOG_INFO_DEL) != 0 || config->itemize_changes ||
-       config->out_format != NULL);
+  config->report_deletes = config->use_delete && !config->dry_run &&
+                           ((config->info_level & LOG_INFO_DEL) != 0 || config->itemize_changes ||
+                            config->out_format != NULL);
   config->report_stats = config->stats || config->show_progress ||
                          (config->info_level & LOG_INFO_PROGRESS) || format_needs_wire ||
                          config->report_deletes || (config->dry_run && config->use_delete);

src/client/client_send.c

@@ -347,8 +347,8 @@ static void print_delete_reports(const Config* config, const ArrayList* paths) {
 }
 
 static void client_progress_begin(const Config* config) {
-  g_progress_active = (config->show_progress || info_flag_enabled(config, LOG_INFO_PROGRESS)) &&
-                      !config->quiet;
+  g_progress_active =
+      (config->show_progress || info_flag_enabled(config, LOG_INFO_PROGRESS)) && !config->quiet;
   g_progress_xferred = 0;
   g_progress_seen = 0;
   if (!g_progress_active) {
@@ -3307,7 +3307,8 @@ int send_files(Config* config) {
     /* rsync default: a scan I/O error suppresses deletion unless
        --ignore-errors, even in the late (commit) modes.  Drop the keep-set so
        the receiver removes nothing; the readable tree still transferred. */
-    bool late_delete = (manifest || config->delete_missing_args) && !delete_early && !delete_per_dir;
+    bool late_delete =
+        (manifest || config->delete_missing_args) && !delete_early && !delete_per_dir;
     if (late_delete && !ignore_errors_allows_delete(config, had_scan_io)) {
       log_message(LOG_LEVEL_WARNING, "IO error encountered -- skipping file deletion");
       if (manifest) {

src/client/scanner.h

@@ -218,7 +218,7 @@ typedef struct {
   int completed;
   Chunk* initial_chunk;
   ProtocolSession* allocation_session;
-  FilterNode* root_filter_node; /* root .rsync-filter context (owned by ps) */
+  FilterNode* root_filter_node;  /* root .rsync-filter context (owned by ps) */
   const ScannerOptions* options; /* borrowed scan options (--info=nonreg output) */
 } ParallelScanner;