devguide: move into userguide as last chapter

Moved devguide dir into userguide dir.
Since the devguide is now incorporated as the last chapter of the
userguide, removed build and configuration files from the devguide
dir, as these are no longer needed.

Task OISF#4909

.clang-format

@@ -1,5 +1,5 @@
 # Suricata settings as per
-#   doc/devguide/codebase/code-style.rst
+#   doc/userguide/devguide/codebase/code-style.rst
 #
 # This file is set up for clang 9. For the settings available, see
 #   https://releases.llvm.org/9.0.0/tools/clang/docs/ClangFormatStyleOptions.html

.github/workflows/builds.yml

@@ -1157,7 +1157,6 @@ jobs:
       - run: make dist
       - name: Checking that documentation was built
         run: |
-          test -e doc/devguide/devguide.pdf
           test -e doc/userguide/userguide.pdf
           test -e doc/userguide/suricata.1
       - name: Extracting suricata-verify

configure.ac

@@ -2534,7 +2534,7 @@ AM_CONDITIONAL([BUILD_SHARED_LIBRARY], [test "x$enable_shared" = "xyes"] && [tes
 
 AC_CONFIG_FILES(Makefile src/Makefile rust/Makefile rust/Cargo.toml rust/derive/Cargo.toml rust/.cargo/config)
 AC_CONFIG_FILES(qa/Makefile qa/coccinelle/Makefile)
-AC_CONFIG_FILES(rules/Makefile doc/Makefile doc/userguide/Makefile doc/devguide/Makefile)
+AC_CONFIG_FILES(rules/Makefile doc/Makefile doc/userguide/Makefile)
 AC_CONFIG_FILES(contrib/Makefile contrib/file_processor/Makefile contrib/file_processor/Action/Makefile contrib/file_processor/Processor/Makefile)
 AC_CONFIG_FILES(suricata.yaml etc/Makefile etc/suricata.logrotate etc/suricata.service)
 AC_CONFIG_FILES(python/Makefile python/suricata/config/defaults.py)

doc/Makefile.am

@@ -1,4 +1,4 @@
-SUBDIRS = userguide devguide
+SUBDIRS = userguide
 
 EXTRA_DIST = \
 AUTHORS \