docs: Switch from gtk-doc SGML mode to XML mode

We already used XML everywhere; just formally switch to XML mode and
eliminate the last few traces of SGML.

diff --git a/docs/reference/libnice/Makefile.am b/docs/reference/libnice/Makefile.am
index 36ac119..ae09791 100644 (file)
--- a/docs/reference/libnice/Makefile.am
+++ b/docs/reference/libnice/Makefile.am
@@ -7,7 +7,7 @@ AUTOMAKE_OPTIONS = 1.6
 DOC_MODULE=libnice
 
 # The top-level SGML file. You can change this if you want to.
-DOC_MAIN_SGML_FILE=$(DOC_MODULE)-docs.sgml
+DOC_MAIN_SGML_FILE=$(DOC_MODULE)-docs.xml
 
 # The directory containing the source code. Relative to $(srcdir).
 # gtk-doc will search all .c & .h files beneath here for inline comments
@@ -24,7 +24,7 @@ SCAN_OPTIONS=--rebuild-types
 
 # Extra options to supply to gtkdoc-mkdb.
 # e.g. MKDB_OPTIONS=--sgml-mode --output-format=xml
-MKDB_OPTIONS=--sgml-mode --output-format=xml
+MKDB_OPTIONS=--xml-mode --output-format=xml
 
 # Extra options to supply to gtkdoc-mktmpl
 # e.g. MKTMPL_OPTIONS=--only-section-tmpl

diff --git a/docs/reference/libnice/libnice-docs.sgml b/docs/reference/libnice/libnice-docs.xml
similarity index 100%
rename from docs/reference/libnice/libnice-docs.sgml
rename to docs/reference/libnice/libnice-docs.xml