[Bug 235456] [maintainer update] japanese/mh: Fix man pages breakage on FreeBSD 11.x and later

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235456

            Bug ID: 235456
           Summary: [maintainer update] japanese/mh: Fix man pages
                    breakage on FreeBSD 11.x and later
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: ports-bugs at FreeBSD.org
          Reporter: CQG00620 at nifty.ne.jp

On recent FreeBSD, japanese/mh's man pages has been broken with mandoc,
the default man page formatter since 11.0-RELEASE.
Because the man pages uses some features that is not supported by mandoc.

(1) The man pages uses .fc macro which is not supported by mandoc.

(2) Some man pages uses .so macro with an absolute file path.
    Mandoc's .so macro only supports a file in the current directory.

(3) Local macro definitions has a trailing whitespace and comment.
    For example:

     .de De  \" Defaults section

    Mandoc ignores these definitions unless the trailing component has
    been removed.  Mandoc's '.de' only accepts a macro name.

(4) The man pages uses \*(lq and \*(rq macros which is not displayed anything
    with mandoc on a tty terminal other than UTF-8 locale.

(5) Many of whitespace in a quoted strings is escaped by backslash.
    The escaped character is not displayed with mandoc.

    For example, "PROFILE\ COMPONENTS" is displayed 'PROFILECOMPONENTS'

How to fix:

(1) Remove the .fc macro and delimiter character.
    Replace the padding character to TAB character.
    (patch-conf_doc_tmac.h and patch-conf_doc_me2man.sed)

(2) Replace the .so macro to the specified file contents.
    (patch-conf_makefiles_doc and an AWK script in Makefile)

(3) Remove the trailing components from the macro name (patch-conf_doc_tmac.h).

(4) Define local macros such as '.ds lq \&"'.  This idea is taken from
    the top(1) man page. (patch-conf_doc_tmac.h)

(5) 's/\\[ 0]/ /g' (patch-conf_doc_me2man.sed)

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