replace assert.h with cassert

The former was deprecated with C++14.

According to the C++11 and C++17 standards, both files are identical.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

src/lib/nfs/Base.cxx

@@ -19,7 +19,8 @@
 
 #include "Base.hxx"
 
-#include <assert.h>
+#include <cassert>
+
 #include <string.h>
 
 static char nfs_base_server[64];

src/lib/nfs/Cancellable.hxx

@@ -25,8 +25,7 @@
 #include <boost/intrusive/list.hpp>
 
 #include <algorithm>
-
-#include <assert.h>
+#include <cassert>
 
 template<typename T>
 class CancellablePointer

src/lib/nfs/Error.cxx

@@ -37,7 +37,8 @@ extern "C" {
 #include <nfsc/libnfs.h>
 }
 
-#include <assert.h>
+#include <cassert>
+
 #include <string.h>
 
 static StringBuffer<256>

src/lib/nfs/FileReader.cxx

@@ -24,10 +24,10 @@
 #include "event/Call.hxx"
 #include "util/ASCII.hxx"
 
-#include <utility>
+#include <cassert>
 #include <stdexcept>
+#include <utility>
 
-#include <assert.h>
 #include <string.h>
 #include <fcntl.h>
 

src/lib/nfs/Glue.cxx

@@ -22,7 +22,7 @@
 #include "event/Call.hxx"
 #include "util/Manual.hxx"
 
-#include <assert.h>
+#include <cassert>
 
 static Manual<NfsManager> nfs_glue;
 static unsigned in_use;