Log Message:
mdocml-1.9.13:
- added: -fign-escape
- fix: -Thtml accessibility (identifiers, table summary, etc.)
- fix: -Tascii -mdoc segfault with specific `Bl -hang' lists
- portability: bzero() -> memset()
- portability: warnx -> fprintf/perror
- fix: -Thtml buffer munging with certain tags
- fix: -Thtml output of some tags (empty divs, etc.)
- portability: compiler attributes
- documentation: significant man.7 and mdoc.7 improvements
- allowing compile-time setting of operating system (-DOSNAME=xxx)
- added `PD' and `%U'
- more mdoc.7 updates
- switched from `-ooptions' to `-Ooptions'
- inclusion of DragonFlyBSD into rendered manuals