Rename net.{c,h} to net_sockets.{c,h}

The library/net.c and its corresponding include/mbedtls/net.h file are
renamed to library/net_sockets.c and include/mbedtls/net_sockets.h
respectively. This is to avoid naming collisions in projects which also
have files with the common name 'net'.
diff --git a/programs/ssl/dtls_client.c b/programs/ssl/dtls_client.c
index b37eb83..442a3fb 100644
--- a/programs/ssl/dtls_client.c
+++ b/programs/ssl/dtls_client.c
@@ -51,7 +51,7 @@
 
 #include <string.h>
 
-#include "mbedtls/net.h"
+#include "mbedtls/net_sockets.h"
 #include "mbedtls/debug.h"
 #include "mbedtls/ssl.h"
 #include "mbedtls/entropy.h"
diff --git a/programs/ssl/dtls_server.c b/programs/ssl/dtls_server.c
index 1d6eb3b..9d0dda4 100644
--- a/programs/ssl/dtls_server.c
+++ b/programs/ssl/dtls_server.c
@@ -67,7 +67,7 @@
 #include "mbedtls/x509.h"
 #include "mbedtls/ssl.h"
 #include "mbedtls/ssl_cookie.h"
-#include "mbedtls/net.h"
+#include "mbedtls/net_sockets.h"
 #include "mbedtls/error.h"
 #include "mbedtls/debug.h"
 #include "mbedtls/timing.h"
diff --git a/programs/ssl/mini_client.c b/programs/ssl/mini_client.c
index 1d78731..290455e 100644
--- a/programs/ssl/mini_client.c
+++ b/programs/ssl/mini_client.c
@@ -68,7 +68,7 @@
 
 #include <string.h>
 
-#include "mbedtls/net.h"
+#include "mbedtls/net_sockets.h"
 #include "mbedtls/ssl.h"
 #include "mbedtls/entropy.h"
 #include "mbedtls/ctr_drbg.h"
diff --git a/programs/ssl/ssl_client1.c b/programs/ssl/ssl_client1.c
index 3516e15..591f737 100644
--- a/programs/ssl/ssl_client1.c
+++ b/programs/ssl/ssl_client1.c
@@ -52,7 +52,7 @@
 }
 #else
 
-#include "mbedtls/net.h"
+#include "mbedtls/net_sockets.h"
 #include "mbedtls/debug.h"
 #include "mbedtls/ssl.h"
 #include "mbedtls/entropy.h"
diff --git a/programs/ssl/ssl_client2.c b/programs/ssl/ssl_client2.c
index 78f9e00..a1d71e1 100644
--- a/programs/ssl/ssl_client2.c
+++ b/programs/ssl/ssl_client2.c
@@ -49,7 +49,7 @@
 }
 #else
 
-#include "mbedtls/net.h"
+#include "mbedtls/net_sockets.h"
 #include "mbedtls/ssl.h"
 #include "mbedtls/entropy.h"
 #include "mbedtls/ctr_drbg.h"
diff --git a/programs/ssl/ssl_fork_server.c b/programs/ssl/ssl_fork_server.c
index 363f38f..7624896 100644
--- a/programs/ssl/ssl_fork_server.c
+++ b/programs/ssl/ssl_fork_server.c
@@ -66,7 +66,7 @@
 #include "mbedtls/certs.h"
 #include "mbedtls/x509.h"
 #include "mbedtls/ssl.h"
-#include "mbedtls/net.h"
+#include "mbedtls/net_sockets.h"
 #include "mbedtls/timing.h"
 
 #include <string.h>
diff --git a/programs/ssl/ssl_mail_client.c b/programs/ssl/ssl_mail_client.c
index c807eb5..4a22771 100644
--- a/programs/ssl/ssl_mail_client.c
+++ b/programs/ssl/ssl_mail_client.c
@@ -54,7 +54,7 @@
 
 #include "mbedtls/base64.h"
 #include "mbedtls/error.h"
-#include "mbedtls/net.h"
+#include "mbedtls/net_sockets.h"
 #include "mbedtls/ssl.h"
 #include "mbedtls/entropy.h"
 #include "mbedtls/ctr_drbg.h"
diff --git a/programs/ssl/ssl_pthread_server.c b/programs/ssl/ssl_pthread_server.c
index c4b02ac..9a05ad8 100644
--- a/programs/ssl/ssl_pthread_server.c
+++ b/programs/ssl/ssl_pthread_server.c
@@ -66,7 +66,7 @@
 #include "mbedtls/certs.h"
 #include "mbedtls/x509.h"
 #include "mbedtls/ssl.h"
-#include "mbedtls/net.h"
+#include "mbedtls/net_sockets.h"
 #include "mbedtls/error.h"
 
 #if defined(MBEDTLS_SSL_CACHE_C)
diff --git a/programs/ssl/ssl_server.c b/programs/ssl/ssl_server.c
index c7f5267..fd54f17 100644
--- a/programs/ssl/ssl_server.c
+++ b/programs/ssl/ssl_server.c
@@ -65,7 +65,7 @@
 #include "mbedtls/certs.h"
 #include "mbedtls/x509.h"
 #include "mbedtls/ssl.h"
-#include "mbedtls/net.h"
+#include "mbedtls/net_sockets.h"
 #include "mbedtls/error.h"
 #include "mbedtls/debug.h"
 
diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c
index 6d4e916..18bda59 100644
--- a/programs/ssl/ssl_server2.c
+++ b/programs/ssl/ssl_server2.c
@@ -50,7 +50,7 @@
 }
 #else
 
-#include "mbedtls/net.h"
+#include "mbedtls/net_sockets.h"
 #include "mbedtls/ssl.h"
 #include "mbedtls/entropy.h"
 #include "mbedtls/ctr_drbg.h"