MFV: Latest mdoc(7) fixes.

contrib/groff/tmac/doc-common

@@ -551,10 +551,6 @@
 .ds doc-date-12 December
 .
 .de Dd
-.  \" XXX: why do we need gX?
-.  if "\*[doc-date-string]"" \
-.    nr gX 1
-.
 .  ie \n[.$] \{\
 .    ie (\n[.$] == 3) \
 .      ds doc-date-string \$1\~\$2 \$3

contrib/groff/tmac/doc-ditroff

@@ -180,8 +180,6 @@
 .ds Ba \f[R]|\f[]
 .ds Am &
 .
-.nr gX 0
-.
 .
 .\" NS doc-header-string global string
 .\" NS   the final string used for the manual page header
@@ -203,12 +201,8 @@
 .  wh 0 doc-header
 .  wh -1.25i doc-footer
 .
-.  if \n[gX] \
-.    ds doc-command-name
-.
 .  br
 .
-.  nr gX 0
 .  e@ doc-end-macro
 ..
 .

contrib/groff/tmac/doc-syms

@@ -697,6 +697,7 @@
 .ds doc-str-Lb-libmagic    Magic Number Recognition Library (libmagic, \-lmagic)
 .ds doc-str-Lb-libmenu     Curses Menu Library (libmenu, \-lmenu)
 .ds doc-str-Lb-libossaudio OSS Audio Emulation Library (libossaudio, \-lossaudio)
+.ds doc-str-Lb-libpam      Pluggable Authentication Module Library (libpam, \-lpam)
 .ds doc-str-Lb-libpcap     Packet Capture Library (libpcap, \-lpcap)
 .ds doc-str-Lb-libpci      PCI Bus Access Library (libpci, \-lpci)
 .ds doc-str-Lb-libpmc      Performance Counters Library (libpmc, \-lpmc)