Fix error and warnings when building with GCC 4.3

--- src/config.cc

+++ src/config.cc

@@ -61,7 +61,7 @@ int SelectOn = SO_SCN; /* select on scenarios */

 int LogTimeFormat = TF_STRING;

-char *SO_Names[] = {

+const char* SO_Names[] = {

                     "",

                     "scenario",

                     "sequence"

--- src/config.h

+++ src/config.h

@@ -47,7 +47,7 @@

 #endif

 #endif

-extern char *SO_Names[];

+extern const char* SO_Names[];

 extern int DNSTTLExpired;

 extern int DNSTimeToLive;

--- src/if.h

+++ src/if.h

@@ -12,6 +12,7 @@

 #ifndef _IF_H

 #define _IF_H

+#include <cstring>

 #include <stdio.h>

 #include <errno.h>

 #ifdef __WIN32__

--- src/scenario.cc

+++ src/scenario.cc

@@ -185,7 +185,7 @@ bool Scenario::Restore(const char * nme, FILE * fp)

             next.push_back(strP);

             break;

         case 'T':        /* think time (milliseconds) */

-            if (buf == "_exit") 

+            if (strcmp(buf,"_exit") == 0) 

             {

                 // it's an exiting scenario

                 terminate = true;

--- src/str.cc

+++ src/str.cc

@@ -309,7 +309,7 @@ string topntail(const string& str)

 string lowercase(const string& instr)

 {

     string InStr = instr;

-    transform(InStr.begin(), InStr.end(), InStr.begin(), (int(*)(int))tolower);

+    std::transform(InStr.begin(), InStr.end(), InStr.begin(), (int(*)(int)) tolower);

     return InStr;

 }

--- utils/convertLog.cc

+++ utils/convertLog.cc

@@ -12,9 +12,10 @@

 // Purpose: Convert a log file into a set of scenarios

 //

+#include <cstdlib>

 #include <time.h>

 #include <stdio.h>

-#include <iostream.h>

+#include <iostream>

 #include <string.h>

 #include <sys/types.h>

@@ -69,7 +70,7 @@ printScenario(FILE *outF, const String& ipA, const String& ipR, long thinkT, int

 }

-main(int argc, char *argv[])

+int main(int argc, char *argv[])

 {

     if (argc != 3)

     {

@@ -263,4 +264,5 @@ main(int argc, char *argv[])

     }

     delete allElements;

     cerr << "\n\n";

+    return 0;

 }

--- utils/strptime.cc

+++ utils/strptime.cc

@@ -404,11 +404,13 @@ strptime_internal (const char * buf, const char * format,

 	      *decided = raw;

 	    }

 #endif

-	  if (!match_string (HERE_AM_STR, rp))

-	    if (match_string (HERE_PM_STR, rp))

-	      is_pm = 1;

-	    else

-	      return NULL;

+	  if (!match_string (HERE_AM_STR, rp)) 

+	    {

+	      if (match_string (HERE_PM_STR, rp))

+	        is_pm = 1;

+	      else

+	        return NULL;

+	    }

 	  break;

 	case 'r':

 #ifdef _NL_CURRENT