Update doxygen support following
tree8ffabab540f0d2811346183391bb85eb61534878
-rwxr-xr-x 220 .gitignore
-rw-r--r-- 148 Makefile.am
-rw-r--r-- 11536 acinclude.m4
-rw-r--r-- 4733 aminclude.am
-rw-r--r-- 77 autogen.sh
-rw-r--r-- 793 configure.ac
-rw-r--r-- 31849 doxygen.cfg
drwxr-xr-x - include
drwxr-xr-x - src
drwxr-xr-x - tests