Reduced the number of tests because otherwise we get really close to the limit on the number

of TCP connections in the TIME_WAIT state on Windows XP.  This results in the tests failing
if you run them multiple times within the TIME_WAIT timeout period.  So this change makes
the tests less likely to false alarm when run on Windows XP.

dlib/test/iosockstream.cpp

@@ -106,7 +106,7 @@ namespace
         // to connect to it.
         dlib::sleep(500);
 
-        for (int i = 0; i < 1001; ++i)
+        for (int i = 0; i < 200; ++i)
         {
             dlog << LINFO << "i: " << i;
             print_spinner();
@@ -142,7 +142,7 @@ namespace
         // to connect to it.
         dlib::sleep(500);
 
-        for (int i = 0; i < 1001; ++i)
+        for (int i = 0; i < 200; ++i)
         {
             dlog << LINFO << "i: " << i;
             print_spinner();