add extra tags to makefile

Author: oraNod

docs/docsite/Makefile

@@ -102,7 +102,7 @@ else
 endif
 
 htmldocs: ansible_structure generate_rst
-	CPUS=$(CPUS) $(MAKE) -f Makefile.sphinx 'DOCS_VARIANTS=-t ansible' html
+	CPUS=$(CPUS) $(MAKE) -f Makefile.sphinx 'DOCS_VARIANTS=-t ansible $(EXTRA_TAGS)' html
 
 core_htmldocs: core_structure core_generate_rst
 ifdef LANGOPTS

docs/docsite/Makefile.sphinx

@@ -2,10 +2,11 @@
 #
 
 # You can set these variables from the command line.
+EXTRA_TAGS    ?=
 DOCS_VARIANTS ?=
 SPHINXCONFDIR = rst
 LANGOPTS      ?=
-SPHINXOPTS    ?= -j $(CPUS) -n -w rst_warnings -c "$(SPHINXCONFDIR)" $(DOCS_VARIANTS) $(LANGOPTS)
+SPHINXOPTS    ?= -j $(CPUS) -n -w rst_warnings -c "$(SPHINXCONFDIR)" $(DOCS_VARIANTS) $(EXTRA_TAGS) $(LANGOPTS)
 SPHINXBUILD   = sphinx-build
 SPHINXPROJ    = sdfsdf
 SOURCEDIR     = rst