esx: Update version checks for vSphere 5.1

Also remove warnings for upcoming versions. There hadn't been any
compatibility problems with new ESX version over the whole lifetime
of the ESX driver, so I don't expect any in the future.

Update documentation to mention vSphere 5.x support.

docs/drvesx.html.in

@@ -2,10 +2,10 @@
     <h1>VMware ESX hypervisor driver</h1>
     <ul id="toc"></ul>
     <p>
-        The libvirt VMware ESX driver can manage VMware ESX/ESXi 3.5/4.x and
+        The libvirt VMware ESX driver can manage VMware ESX/ESXi 3.5/4.x/5.x and
         VMware GSX 2.0, also called VMware Server 2.0, and possibly later
         versions. <span class="since">Since 0.8.3</span> the driver can also
-        connect to a VMware vCenter 2.5/4.x (VPX).
+        connect to a VMware vCenter 2.5/4.x/5.x (VPX).
     </p>
 
     <h2><a name="project">Project Links</a></h2>

src/esx/esx_vi.c

@@ -833,16 +833,12 @@ esxVI_Context_Connect(esxVI_Context *ctx, const char *url,
             ctx->apiVersion = esxVI_APIVersion_41;
         } else if (STRPREFIX(ctx->service->about->apiVersion, "4.")) {
             ctx->apiVersion = esxVI_APIVersion_4x;
-
-            VIR_WARN("Found untested VI API major/minor version '%s'",
-                     ctx->service->about->apiVersion);
         } else if (STRPREFIX(ctx->service->about->apiVersion, "5.0")) {
             ctx->apiVersion = esxVI_APIVersion_50;
+        } else if (STRPREFIX(ctx->service->about->apiVersion, "5.1")) {
+            ctx->apiVersion = esxVI_APIVersion_51;
         } else if (STRPREFIX(ctx->service->about->apiVersion, "5.")) {
             ctx->apiVersion = esxVI_APIVersion_5x;
-
-            VIR_WARN("Found untested VI API major/minor version '%s'",
-                     ctx->service->about->apiVersion);
         } else {
             virReportError(VIR_ERR_INTERNAL_ERROR,
                            _("Expecting VI API major/minor version '2.5', '4.x' or "
@@ -869,16 +865,12 @@ esxVI_Context_Connect(esxVI_Context *ctx, const char *url,
                 ctx->productVersion = esxVI_ProductVersion_ESX41;
             } else if (STRPREFIX(ctx->service->about->version, "4.")) {
                 ctx->productVersion = esxVI_ProductVersion_ESX4x;
-
-                VIR_WARN("Found untested ESX major/minor version '%s'",
-                         ctx->service->about->version);
             } else if (STRPREFIX(ctx->service->about->version, "5.0")) {
                 ctx->productVersion = esxVI_ProductVersion_ESX50;
+            } else if (STRPREFIX(ctx->service->about->version, "5.1")) {
+                ctx->productVersion = esxVI_ProductVersion_ESX51;
             } else if (STRPREFIX(ctx->service->about->version, "5.")) {
                 ctx->productVersion = esxVI_ProductVersion_ESX5x;
-
-                VIR_WARN("Found untested ESX major/minor version '%s'",
-                         ctx->service->about->version);
             } else {
                 virReportError(VIR_ERR_INTERNAL_ERROR,
                                _("Expecting ESX major/minor version '3.5', "
@@ -895,16 +887,12 @@ esxVI_Context_Connect(esxVI_Context *ctx, const char *url,
                 ctx->productVersion = esxVI_ProductVersion_VPX41;
             } else if (STRPREFIX(ctx->service->about->version, "4.")) {
                 ctx->productVersion = esxVI_ProductVersion_VPX4x;
-
-                VIR_WARN("Found untested VPX major/minor version '%s'",
-                         ctx->service->about->version);
             } else if (STRPREFIX(ctx->service->about->version, "5.0")) {
                 ctx->productVersion = esxVI_ProductVersion_VPX50;
+            } else if (STRPREFIX(ctx->service->about->version, "5.1")) {
+                ctx->productVersion = esxVI_ProductVersion_VPX51;
             } else if (STRPREFIX(ctx->service->about->version, "5.")) {
                 ctx->productVersion = esxVI_ProductVersion_VPX5x;
-
-                VIR_WARN("Found untested VPX major/minor version '%s'",
-                         ctx->service->about->version);
             } else {
                 virReportError(VIR_ERR_INTERNAL_ERROR,
                                _("Expecting VPX major/minor version '2.5', '4.x' "

src/esx/esx_vi.h

@@ -95,7 +95,8 @@ enum _esxVI_APIVersion {
     esxVI_APIVersion_41,
     esxVI_APIVersion_4x, /* > 4.1 */
     esxVI_APIVersion_50,
-    esxVI_APIVersion_5x  /* > 5.0 */
+    esxVI_APIVersion_51,
+    esxVI_APIVersion_5x  /* > 5.1 */
 };
 
 /*
@@ -114,7 +115,8 @@ enum _esxVI_ProductVersion {
     esxVI_ProductVersion_ESX41 = esxVI_ProductVersion_ESX | 3,
     esxVI_ProductVersion_ESX4x = esxVI_ProductVersion_ESX | 4, /* > 4.1 */
     esxVI_ProductVersion_ESX50 = esxVI_ProductVersion_ESX | 5,
-    esxVI_ProductVersion_ESX5x = esxVI_ProductVersion_ESX | 6, /* > 5.0 */
+    esxVI_ProductVersion_ESX51 = esxVI_ProductVersion_ESX | 6,
+    esxVI_ProductVersion_ESX5x = esxVI_ProductVersion_ESX | 7, /* > 5.1 */
 
     esxVI_ProductVersion_VPX   = (1 << 2) << 16,
     esxVI_ProductVersion_VPX25 = esxVI_ProductVersion_VPX | 1,
@@ -122,7 +124,8 @@ enum _esxVI_ProductVersion {
     esxVI_ProductVersion_VPX41 = esxVI_ProductVersion_VPX | 3,
     esxVI_ProductVersion_VPX4x = esxVI_ProductVersion_VPX | 4, /* > 4.1 */
     esxVI_ProductVersion_VPX50 = esxVI_ProductVersion_VPX | 5,
-    esxVI_ProductVersion_VPX5x = esxVI_ProductVersion_VPX | 6  /* > 5.0 */
+    esxVI_ProductVersion_VPX51 = esxVI_ProductVersion_VPX | 6,
+    esxVI_ProductVersion_VPX5x = esxVI_ProductVersion_VPX | 7  /* > 5.1 */
 };
 
 enum _esxVI_Occurrence {