Merge branch 'development' into development-restricted

* development: (30 commits)
  update README file (#1144)
  Fix typo in asn1.h
  Improve leap year test names in x509parse.data
  Correctly handle leap year in x509_date_is_valid()
  Renegotiation: Add tests for SigAlg ext parsing
  Parse Signature Algorithm ext when renegotiating
  Minor style fix
  config.pl get: be better behaved
  config.pl get: don't rewrite config.h; detect write errors
  Fixed "config.pl get" for options with no value
  Fix typo and bracketing in macro args
  Ensure failed test_suite output is sent to stdout
  Remove use of GNU sed features from ssl-opt.sh
  Fix typos in ssl-opt.sh comments
  Add ssl-opt.sh test to check gmt_unix_time is good
  Extend ssl-opt.h so that run_test takes function
  Always print gmt_unix_time in TLS client
  Restored note about using minimum functionality in makefiles
  Note in README that GNU make is required
  Fix changelog for ssl_server2.c usage fix
  ...

README.md

@@ -16,7 +16,7 @@ There are currently four active build systems used within mbed TLS releases:
 -   yotta
 -   GNU Make
 -   CMake
--   Microsoft Visual Studio (Visual Studio 6 and Visual Studio 2010)
+-   Microsoft Visual Studio (Microsoft Visual Studio 2010 or later)
 
 The main systems used for development are CMake and GNU Make. Those systems are always complete and up-to-date. The others should reflect all changes present in the CMake and Make build system, although features may not be ported there automatically.
 

library/ssl_tls.c

@@ -6187,7 +6187,6 @@ int mbedtls_ssl_set_hostname( mbedtls_ssl_context *ssl, const char *hostname )
 
     /* Check if new hostname is valid before
      * making any change to current one */
-
     if( hostname != NULL )
     {
         hostname_len = strlen( hostname );
@@ -6214,7 +6213,6 @@ int mbedtls_ssl_set_hostname( mbedtls_ssl_context *ssl, const char *hostname )
     else
     {
         ssl->hostname = mbedtls_calloc( 1, hostname_len + 1 );
-
         if( ssl->hostname == NULL )
             return( MBEDTLS_ERR_SSL_ALLOC_FAILED );