Fix a few areas where obscure compilers sometimes choke

src/HttpServer.c

@@ -576,7 +576,6 @@ HttpServerWorkerThread(void *args)
             char *headerKey;
             char *headerValue;
             char *headerPtr;
-            ssize_t i;
 
             if (strcmp(line, "\r\n") == 0)
             {

src/Json.c

@@ -469,7 +469,7 @@ JsonDecodeString(FILE * in)
                         if (utf8 == 0)
                         {
                             /*
-                             * We read in a \u0000, null. There is no
+                             * We read in a 0000, null. There is no
                              * circumstance in which putting a null
                              * character into our buffer will end well.
                              *

src/Util.c

@@ -37,6 +37,10 @@
 #include <sys/stat.h>
 #include <limits.h>
 
+#ifndef PATH_MAX
+#define PATH_MAX 256
+#endif
+
 unsigned long
 UtilServerTs(void)
 {