Validate that url is of an allowed format
#include <cgi/cgi.h>
NEOERR *cgi_url_validate (const char *buf, char **esc);
buf - a 0 terminated string
cgi_url_validate will check that a URL starts with one of the accepted safe schemes. If not, it returns "#" as a safe substitute. Currently accepted schemes are http, https, ftp and mailto. It then html escapes the entire URL so that it is safe to insert in an href attribute.
esc - a newly allocated string
cgi_debug_init(3), cgi_parse(3), cgi_destroy(3), cgi_js_escape(3), cgi_html_escape_strfunc(3), cgi_register_strfuncs(3), cgi_output(3), parse_rfc2388(3), cgi_url_validate(3), open_upload(3), cgi_cs_init(3), cgi_url_escape_more(3), cgi_html_strip_strfunc(3), cgi_neo_error(3), cgi_redirect(3), cgi_filehandle(3), cgi_register_parse_cb(3), cgi_url_escape(3), cgi_init(3), cgi_redirect_uri(3), cgi_cookie_clear(3), cgi_url_unescape(3), cgi_vredirect(3), cgi_display(3), cgi_html_ws_strip(3), cgi_error(3), cgi_cookie_set(3), cgi_text_html_strfunc(3), cgi_cookie_authority