main: Replace -debug with -log-level

Running crio with -debug is very verbose. Having more granularity
on the log level can be useful when e.g. only looking for errors.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

docs/crio.8.md

@@ -13,13 +13,13 @@ crio - OCI Kubernetes Container Runtime daemon
 [**--config**=[*value*]]
 [**--conmon**=[*value*]]
 [**--cpu-profile**=[*value*]]
-[**--debug**]
 [**--default-transport**=[*value*]]
 [**--help**|**-h**]
 [**--insecure-registry**=[*value*]]
 [**--listen**=[*value*]]
 [**--log**=[*value*]]
 [**--log-format value**]
+[**--log-level value**]
 [**--pause-command**=[*value*]]
 [**--pause-image**=[*value*]]
 [**--registry**=[*value*]]
@@ -66,9 +66,6 @@ crio is meant to provide an integration path between OCI conformant runtimes and
 **--cpu-profile**=""
 set the CPU profile file path
 
-**--debug**
-  Enable debug output for logging
-
 **--default-transport**
   A prefix to prepend to image names that can't be pulled as-is.
 
@@ -105,6 +102,9 @@ set the CPU profile file path
 **--log-format**=""
   Set the format used by logs ('text' (default), or 'json') (default: "text")
 
+**--log-level**=""
+  log CRI-O messages above specified level: debug, info (default), warn, error, fatal or panic
+
 **--log-size-max**=""
   Maximum log size in bytes for a container (default: -1 (no limit))