pieeprom-2025-02-24: 2711: Implement TCP window for net boot (latest)

* Signed boot and HTTP boot mode
  HTTP boot mode is supposed to be disabled if signed boot is enabled and
  a host is not specified. The code is checking the http_secure flag to
  enforce this. But this is valid now we support custom CA certs.
  Only disable HTTP mode if we're using the default HOST.
* Implement TCP window for net boot
  The minimal IP stack used for https booting lacks the ability to cache
  packets received out of order, which can lead to severe slowdown when
  it happens. The problem seems to affect some ISPs more than others.
  The receive window implemented here copes with packet losses of 10%.
* netboot: Correct the TCP MSS
* Correct msecs in debug timestamps
  The fractional part of timestamps in UART debug output was showing the
  100ths and 1000ths of a second, rather than 10ths and 100ths, causing
  strange sequences that appear to jump backwards.

Author: timg236

firmware-2711/latest/pieeprom-2025-02-24.bin

@@ -1,5 +1,22 @@
 # Raspberry Pi4 bootloader EEPROM release notes
 
+## 2025-05-08: Implement TCP window for net boot (latest)
+* Signed boot and HTTP boot mode
+  HTTP boot mode is supposed to be disabled if signed boot is enabled and
+  a host is not specified. The code is checking the http_secure flag to
+  enforce this. But this is valid now we support custom CA certs.
+  Only disable HTTP mode if we're using the default HOST.
+* Implement TCP window for net boot
+  The minimal IP stack used for https booting lacks the ability to cache
+  packets received out of order, which can lead to severe slowdown when
+  it happens. The problem seems to affect some ISPs more than others.
+  The receive window implemented here copes with packet losses of 10%.
+* netboot: Correct the TCP MSS
+* Correct msecs in debug timestamps
+  The fractional part of timestamps in UART debug output was showing the
+  100ths and 1000ths of a second, rather than 10ths and 100ths, causing
+  strange sequences that appear to jump backwards.
+
 ## 2025-02-17: Promote 2025-02-11 to default release (default)
 
 ## 2025-02-11: recovery: Walk partitions to delete recovery.bin (latest)