Update Doxygen config for the latest version.

docs/Doxyfile

@@ -34,6 +34,7 @@ OPTIMIZE_OUTPUT_SLICE  = NO
 EXTENSION_MAPPING      =
 MARKDOWN_SUPPORT       = YES
 TOC_INCLUDE_HEADINGS   = 5
+MARKDOWN_ID_STYLE      = GITHUB
 AUTOLINK_SUPPORT       = YES
 BUILTIN_STL_SUPPORT    = YES
 CPP_CLI_SUPPORT        = NO
@@ -47,6 +48,7 @@ INLINE_SIMPLE_STRUCTS  = NO
 TYPEDEF_HIDES_STRUCT   = NO
 LOOKUP_CACHE_SIZE      = 0
 NUM_PROC_THREADS       = 0
+TIMESTAMP              = NO
 EXTRACT_ALL            = NO
 EXTRACT_PRIVATE        = NO
 EXTRACT_PRIV_VIRTUAL   = NO
@@ -93,6 +95,7 @@ WARN_IF_UNDOCUMENTED   = NO
 WARN_IF_DOC_ERROR      = YES
 WARN_IF_INCOMPLETE_DOC = YES
 WARN_NO_PARAMDOC       = NO
+WARN_IF_UNDOC_ENUM_VAL = NO
 WARN_AS_ERROR          = NO
 WARN_FORMAT            = "$file:$line: $text"
 WARN_LINE_FORMAT       = "at line $line of file $file"
@@ -142,7 +145,6 @@ HTML_COLORSTYLE        = AUTO_LIGHT
 HTML_COLORSTYLE_HUE    = 220
 HTML_COLORSTYLE_SAT    = 100
 HTML_COLORSTYLE_GAMMA  = 80
-HTML_TIMESTAMP         = NO
 HTML_DYNAMIC_MENUS     = YES
 HTML_DYNAMIC_SECTIONS  = NO
 HTML_INDEX_NUM_ENTRIES = 100
@@ -159,6 +161,7 @@ GENERATE_CHI           = NO
 CHM_INDEX_ENCODING     =
 BINARY_TOC             = NO
 TOC_EXPAND             = NO
+SITEMAP_URL            =
 GENERATE_QHP           = NO
 QCH_FILE               =
 QHP_NAMESPACE          = org.doxygen.Project
@@ -209,7 +212,6 @@ USE_PDFLATEX           = YES
 LATEX_BATCHMODE        = NO
 LATEX_HIDE_INDICES     = NO
 LATEX_BIB_STYLE        = plain
-LATEX_TIMESTAMP        = NO
 LATEX_EMOJI_DIRECTORY  =
 GENERATE_RTF           = NO
 RTF_OUTPUT             = rtf
@@ -249,7 +251,6 @@ GENERATE_TAGFILE       =
 ALLEXTERNALS           = NO
 EXTERNAL_GROUPS        = YES
 EXTERNAL_PAGES         = YES
-DIA_PATH               =
 HIDE_UNDOC_RELATIONS   = YES
 HAVE_DOT               = NO
 DOT_NUM_THREADS        = 0
@@ -276,7 +277,7 @@ DOT_IMAGE_FORMAT       = png
 INTERACTIVE_SVG        = NO
 DOT_PATH               =
 DOTFILE_DIRS           =
-MSCFILE_DIRS           =
+DIA_PATH               =
 DIAFILE_DIRS           =
 PLANTUML_JAR_PATH      =
 PLANTUML_CFG_FILE      =
@@ -286,3 +287,5 @@ MAX_DOT_GRAPH_DEPTH    = 0
 DOT_MULTI_TARGETS      = NO
 GENERATE_LEGEND        = YES
 DOT_CLEANUP            = YES
+MSCGEN_TOOL            =
+MSCFILE_DIRS           =