Get hostname for dcdbtools from DCDB_HOSTNAME environment variable if set.

DCDBTools/dcdbconfig/dcdbconfig.cpp

@@ -34,7 +34,11 @@ int main(int argc, char* argv[])
   }
 
   int ret;
-  const char *host = "localhost";
+  const char *host = getenv("DCDB_HOSTNAME");
+  if (!host) {
+      host = "localhost";
+  }
+
   while ((ret=getopt(argc, argv, "+h:"))!=-1) {
       switch(ret) {
           case 'h':

DCDBTools/dcdbquery/dcdbquery.cpp

@@ -50,7 +50,11 @@ int main(int argc, char* argv[])
 
   /* Get the options */
   int ret;
-  const char *host = "localhost";
+  const char *host = getenv("DCDB_HOSTNAME");
+  if (!host) {
+      host = "localhost";
+  }
+
   while ((ret=getopt(argc, argv, "+h:rlf"))!=-1) {
       switch(ret) {
           case 'h':