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/library/error.c b/library/error.c
index 4bd15bf..71d4faa 100644
--- a/library/error.c
+++ b/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)
