+ /* Remove any enclosing quotes from the timezone identifier. I don't believe that it's
+ legal for it to be quoted, according to RFC 5545 ยง 3.2.19:
+ tzidparam = "TZID" "=" [tzidprefix] paramtext
+ tzidprefix = "/"
+ where paramtext includes SAFE-CHAR, which specifically excludes DQUOTE. But we'll
+ be generous and strip quotes. */
+ char *buf = mh_xmalloc(strlen(p->values->value) + 1);
+ unquote_string(p->values->value, buf);
+ dt_timezone = buf;