9718 update mandoc to 1.14.4

*** 32,42 ****
                     | "set" text text
                     | "undef" text
                     | "sqrt" box
                     | box pos box
                     | box mark
!                    | "matrix" "{" [col "{" list "}" ]*
                     | pile "{" list "}"
                     | font box
                     | "size" text box
                     | "left" text eqn ["right" text]
             col     : "lcol" | "rcol" | "ccol" | "col"
--- 32,42 ----
                     | "set" text text
                     | "undef" text
                     | "sqrt" box
                     | box pos box
                     | box mark
!                    | "matrix" "{" [col "{" list "}"]* "}"
                     | pile "{" list "}"
                     | font box
                     | "size" text box
                     | "left" text eqn ["right" text]
             col     : "lcol" | "rcol" | "ccol" | "col"
*** 292,297 ****
       1989 by James Clark.  The eqn component of mandoc(1) was added in 2011.
  
  AUTHORS
       This eqn reference was written by Kristaps Dzonsons <kristaps@bsd.lv>.
  
! illumos                          July 20, 2017                         illumos
--- 292,297 ----
       1989 by James Clark.  The eqn component of mandoc(1) was added in 2011.
  
  AUTHORS
       This eqn reference was written by Kristaps Dzonsons <kristaps@bsd.lv>.
  
! illumos                        September 4, 2017                       illumos