Config now show the webserver h2o (#4864)

Usefull when comparing results

frameworks/C/h2o/benchmark_config.json

@@ -18,7 +18,7 @@
       "flavor": "None",
       "orm": "Raw",
       "platform": "None",
-      "webserver": "None",
+      "webserver": "h2o",
       "os": "Linux",
       "database_os": "Linux",
       "display_name": "H2O",

frameworks/Crystal/h2o.cr/benchmark_config.json

@@ -14,7 +14,7 @@
         "flavor": "None",
         "orm": "Raw",
         "platform": "None",
-        "webserver": "None",
+        "webserver": "h2o",
         "os": "Linux",
         "database_os": "Linux",
         "display_name": "crystal-h2o",