Fix: doc: enable doxygen comment blocks in source under lib

Previously doxygen public API documentation would be produced only if the
comment blocks were in the header files. Now it will use comment blocks in
source files as well. This also enables viewing indexed source code within the
doxygen documentation and showing more include graphs.

Non-public APIs are unaffected because INPUT only controls what is processed,
not what is documented. However, both public and private source files and
headers under the include and lib directories are now viewable in the indexed
source code, and private data structures do show up under "Data Structures".

Author: kgaillot

Doxyfile.in

@@ -733,9 +733,8 @@ WARN_LOGFILE           =
 # spaces.
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = include/crm \
-                         include/crm_config.h \
-                         include/doxygen.h
+INPUT                  = include \
+                         lib
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
@@ -2150,7 +2149,7 @@ INCLUDED_BY_GRAPH      = YES
 # The default value is: NO.
 # This tag requires that the tag HAVE_DOT is set to YES.
 
-CALL_GRAPH             = YES
+CALL_GRAPH             = NO
 
 # If the CALLER_GRAPH tag is set to YES then doxygen will generate a caller
 # dependency graph for every global function or class method.
@@ -2161,7 +2160,7 @@ CALL_GRAPH             = YES
 # The default value is: NO.
 # This tag requires that the tag HAVE_DOT is set to YES.
 
-CALLER_GRAPH           = YES
+CALLER_GRAPH           = NO
 
 # If the GRAPHICAL_HIERARCHY tag is set to YES then doxygen will graphical
 # hierarchy of all classes instead of a textual one.

GNUmakefile

@@ -265,7 +265,7 @@ global: clean-generic
 	groff -mandoc `man -w ./$<` -T html > $@
 	rsync -azxlSD --progress $@ [email protected]:/var/www/html/man/
 
-doxygen:
+doxygen: Doxyfile
 	doxygen Doxyfile
 
 abi: