Rename config.h to mbedtls_config.h

This commit was generated using the following script:

# ========================
#!/bin/sh
git ls-files | grep -v '^ChangeLog' | xargs sed -b -E -i '
s/((check|crypto|full|mbedtls|query)_config)\.h/\1\nh/g
s/config\.h/mbedtls_config.h/g
y/\n/./
'
mv include/mbedtls/config.h include/mbedtls/mbedtls_config.h
# ========================

Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index da3ca9c..ed3936a 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -211,7 +211,7 @@
  * \name SECTION: Module settings
  *
  * The configuration options you can set for this module are in this section.
- * Either change them in config.h or define them on the compiler command line.
+ * Either change them in mbedtls_config.h or define them on the compiler command line.
  * \{
  */
 
@@ -3539,7 +3539,7 @@
  *
  * \note           The logic to determine the maximum outgoing record payload is
  *                 version-specific. It takes into account various factors, such as
- *                 the config.h setting \c MBEDTLS_SSL_OUT_CONTENT_LEN, extensions
+ *                 the mbedtls_config.h setting \c MBEDTLS_SSL_OUT_CONTENT_LEN, extensions
  *                 such as the max fragment length or record size limit extension if
  *                 used, and for DTLS the path MTU as configured and current
  *                 record expansion.
@@ -3566,7 +3566,7 @@
  *
  * \note           The logic to determine the maximum outgoing record payload is
  *                 version-specific. It takes into account various factors, such as
- *                 the config.h setting \c MBEDTLS_SSL_IN_CONTENT_LEN, extensions
+ *                 the mbedtls_config.h setting \c MBEDTLS_SSL_IN_CONTENT_LEN, extensions
  *                 such as the max fragment length extension or record size limit
  *                 extension if used, and the current record expansion.
  *