net_sockets: Fix typo in net_would_block()

Fixes #528

ChangeLog

@@ -63,6 +63,7 @@ Bugfix
    * Fix multiple X.509 functions previously returning ASN.1 low-level error
      codes to always wrap these codes into X.509 high level error codes before
      returning. Fixes #2431.
+   * Fix typo in net_would_block(). Fixes #528 reported by github-monoculture.
 
 API Changes
    * Extend the MBEDTLS_SSL_EXPORT_KEYS to export the handshake randbytes,

library/net_sockets.c

@@ -284,7 +284,7 @@ static int net_would_block( const mbedtls_net_context *ctx )
     int err = errno;
 
     /*
-     * Never return 'WOULD BLOCK' on a non-blocking socket
+     * Never return 'WOULD BLOCK' on a blocking socket
      */
     if( ( fcntl( ctx->fd, F_GETFL ) & O_NONBLOCK ) != O_NONBLOCK )
     {