README: improve, documenting new vmware detection mechanisms and impr…

…oving rationale prose (closes #4)

README.md

@@ -2,11 +2,24 @@
 
 Detect if your container/VPS is running under a specific hypervisor.
 
-Why would you want this?  Well... a lot of dishonest hosting providers will run their
-OpenVZ/LXC containers inside another virtual machine.
+Why would you want this?
 
-This tool is meant to expose such subterfuge.  In a lot of cases, they will attempt to
-hide it, by either obfuscating cpuinfo or other sloppyness.
+Some hosting providers run their container hosting services (OpenVZ,
+LXC VPS, Docker-as-a-Service, etc) under a parent hypervisor, without
+disclosing that practice.  Worse yet, a few providers have been caught
+doing this while explicitly claiming not to.
+
+There are also of course, providers which do rightfully disclose their
+usage of a parent hypervisor for their services, usually as part of a
+high availability scheme.
+
+In essence, the point of this tool is simply to disclose whether or not
+your container is running under a hypervisor, and what information can be
+collected about the hypervisor from inside the container.
+
+It also detects common container types (i.e. OpenVZ), to clarify to the
+user whether or not their VPS environment is inside a container, whether it's
+in a hypervisor, or whether both aspects apply (container inside hypervisor).
 
 ## usage
 
@@ -16,6 +29,7 @@ Just download the source and go, basically.  You'll need GCC installed, of cours
 kaniini@localhost ~/slabbed-or-not> make
 gcc -o slabbed-or-not slabbed-or-not.c
 kaniini@localhost ~/slabbed-or-not> ./slabbed-or-not
+Container: OpenVZ
 Hypervisor: Xen PV
 Version: 4.3
 ```
@@ -26,13 +40,10 @@ Version: 4.3
   * PV or HVM mode
   * Hypervisor version
 * VMware
+  * Hypervisor type (Workstation, GSX/ESX)
+  * Enumeratable virtual devices
+  * VMware Tools backdoor protocol version (usually 6)
+  * Virtualized hardware model version
 * Hyper-V
 * KVM
 * bhyve
-
-## what it's not
-
-This is not a substitute for `virt-what`.  `virt-what` is supposed to detect what
-you've been sold, not what they are actually providing.  So, it should rightfully report
-an OpenVZ or LXC container as such.  Even if it's running under a hypervisor.
-