website: Make latest release (1.7) be default manual (#3130)

Fixes issue with confusion about features that has not been
released yet.

Move deveopment manual.yml to dev/manual.yml
Symlink manual.yml to v1.7/manual.yml
Refactor to share history header with links to other manual versions.
Change man.test and man page generation to use dev/manual.yml

Related to #3078 #3127

Makefile.am

@@ -160,10 +160,10 @@ check_DATA = tests/man.test
 # Making changes to the manpage without having the python deps means your
 # tests won't run. If you aren't making changes to the examples, you probably
 # don't care. But if you are, then you need to run the tests anyway.
-tests/man.test tests/manonig.test: $(srcdir)/docs/content/manual/manual.yml
+tests/man.test tests/manonig.test: $(srcdir)/docs/content/manual/dev/manual.yml
 if ENABLE_DOCS
 	$(AM_V_GEN) ( cd ${abs_srcdir}/docs && \
-	  $(PIPENV) run python validate_manual_schema.py content/manual/manual.yml && \
+	  $(PIPENV) run python validate_manual_schema.py content/manual/dev/manual.yml && \
 	  $(PIPENV) run python build_mantests.py )
 else
 	@echo Changes to the manual.yml require docs to be enabled to update the manual test.
@@ -176,10 +176,10 @@ endif
 # manpage, then we'll end up using the cached version. Otherwise, we need to
 # rebuild it.
 man_MANS = jq.1
-jq.1.prebuilt: $(srcdir)/docs/content/manual/manual.yml
+jq.1.prebuilt: $(srcdir)/docs/content/manual/dev/manual.yml
 if ENABLE_DOCS
 	$(AM_V_GEN) ( cd ${abs_srcdir}/docs && \
-	  $(PIPENV) run python validate_manual_schema.py content/manual/manual.yml && \
+	  $(PIPENV) run python validate_manual_schema.py content/manual/dev/manual.yml && \
 	  $(PIPENV) run python build_manpage.py ) > $@
 else
 	@echo Changes to the manual.yml require docs to be enabled to update the manpage.