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'.

library/CMakeLists.txt

@@ -71,7 +71,7 @@ set(src_x509
 
 set(src_tls
     debug.c
-    net.c
+    net_sockets.c
     ssl_cache.c
     ssl_ciphersuites.c
     ssl_cli.c

library/Makefile

@@ -68,9 +68,10 @@ OBJS_X509=	certs.o		pkcs11.o	x509.o		\
 		x509_create.o	x509_crl.o	x509_crt.o	\
 		x509_csr.o	x509write_crt.o	x509write_csr.o
 
-OBJS_TLS=	debug.o		net.o		ssl_cache.o	\
-		ssl_ciphersuites.o		ssl_cli.o	\
-		ssl_cookie.o	ssl_srv.o	ssl_ticket.o	\
+OBJS_TLS=	debug.o		net_sockets.o		\
+		ssl_cache.o	ssl_ciphersuites.o	\
+		ssl_cli.o	ssl_cookie.o		\
+		ssl_srv.o	ssl_ticket.o		\
 		ssl_tls.o
 
 .SILENT:

library/error.c

@@ -102,7 +102,7 @@
 #endif
 
 #if defined(MBEDTLS_NET_C)
-#include "mbedtls/net.h"
+#include "mbedtls/net_sockets.h"
 #endif
 
 #if defined(MBEDTLS_OID_C)

library/net_sockets.c

@@ -38,7 +38,7 @@
 #include <stdlib.h>
 #endif
 
-#include "mbedtls/net.h"
+#include "mbedtls/net_sockets.h"
 
 #include <string.h>