markdownlint: enable rule MD001

MD001 - Header levels should only increment by one level at a time
Fixed all MD001 errors

Signed-off-by: wawryk <maciejx.wawryk@intel.com>
Change-Id: I6c0d711b30246e8a9d00bc991edbf34c3cf68805
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/8939
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>

doc/spdkcli.md

@@ -7,21 +7,21 @@ This experimental version was added for v18.04 to get early feedback
 that can be incorporated as spdkcli becomes more fully-featured
 for the next SPDK release.
 
-### Install needed dependencies
+## Install needed dependencies
 
 All dependencies should be handled by scripts/pkgdep.sh script.
 Package dependencies at the moment include:
 
  - configshell
 
-### Run SPDK application instance
+## Run SPDK application instance
 
 ~~~{.sh}
 ./scripts/setup.sh
 ./build/bin/vhost -c vhost.json
 ~~~
 
-### Run SPDK CLI
+## Run SPDK CLI
 
 Spdkcli should be run with the same privileges as SPDK application.
 In order to use SPDK CLI in interactive mode please use:
@@ -37,7 +37,7 @@ For example, to view current configuration and immediately exit:
 scripts/spdkcli.py ls
 ~~~
 
-### Optional - create Python virtual environment
+## Optional - create Python virtual environment
 
 You can use Python virtual environment if you don't want to litter your
 system Python installation.

mdl_rules.rb

@@ -1,5 +1,4 @@
 all
-exclude_rule 'MD001'
 exclude_rule 'MD002'
 exclude_rule 'MD003'
 exclude_rule 'MD004'