Added options parameter to renderers.

To keep the API simple and avoid API changes when new options are
added, this is just a long integer.

Set it by disjoining options that are defined as powers of 2:  e.g.
`CMARK_HTML_SOURCEPOS | CMARK_HTML_HARDREAKS`.

Test options using `&`: `if (options & CMARK_HTML_SOURCEPOS)`.

Added `--hardbreaks` and `--sourcepos` command-line options.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/xml.c b/src/xml.c
index 2cfd800..8f48a12 100644
--- a/src/xml.c
+++ b/src/xml.c
@@ -120,7 +120,7 @@ S_render_node(cmark_node *node, cmark_event_type ev_type, void *vstate)
 	return 1;
 }
 
-char *cmark_render_xml(cmark_node *root)
+char *cmark_render_xml(cmark_node *root, long options)
 {
 	char *result;
 	cmark_strbuf xml = GH_BUF_INIT;