Remove MBEDTLS_SSL_MAX_CONTENT_LEN option
Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/docs/3.0-migration-guide.d/remove-max-content-len.md b/docs/3.0-migration-guide.d/remove-max-content-len.md
new file mode 100644
index 0000000..40c7d53
--- /dev/null
+++ b/docs/3.0-migration-guide.d/remove-max-content-len.md
@@ -0,0 +1,10 @@
+Remove the `MBEDTLS_SSL_MAX_CONTENT_LEN` configuration option
+-------------------------------------------------------------
+
+This affects users who use the `MBEDTLS_SSL_MAX_CONTENT_LEN` option to
+set the maximum length of incoming and outgoing plaintext fragments,
+which can save memory by reducing the size of the TLS I/O buffers.
+
+This option is replaced by the more fine-grained options
+`MBEDTLS_SSL_IN_CONTENT_LEN` and `MBEDTLS_SSL_OUT_CONTENT_LEN` that set
+the maximum incoming and outgoing plaintext fragment lengths, respectively.