MFH: r352923

Import upstream commit to fix the build with recent versions of GCC.

getcwd(3) needs unistd.h.

Approved by:	portmgr (erwin)

net-p2p/verlihub/files/patch-src__stringutils.cpp

@@ -0,0 +1,19 @@
+commit 4d6a2ebf7e47b2854fdf4a9cc7daec625b035b3c
+Author: Nimesh Ghelani <nimeshghelani@gmail.com>
+Date:   Sat Nov 10 01:47:07 2012 +0530
+
+    added unistd.h to stringutils.cpp causing compilation error
+
+diff --git a/src/stringutils.cpp b/src/stringutils.cpp
+index 35d7d46..b020a79 100755
+--- src/stringutils.cpp
++++ src/stringutils.cpp
+@@ -32,6 +32,8 @@
+ #include <ctype.h>
+ #ifdef _WIN32
+ #include <windows.h>
++#else
++#include <unistd.h>
+ #endif
+ 
+ namespace nVerliHub {