Structure of manpage output:

doctext
-----------------------------------------------------------------------
bof   - beginning of file
bop   - beginning of page (manpage)
mantitle
em_dash - used to separate name from description

s_synopsis - beginning of Synopsis
e_synopsis - end of Synopsis

section - (name:)

s_arg  - argument and definition (. arg - definition )
e_arg
s_defn
e_defn

tt - Fonts for quoted text handleing (-quotefmt)
em
rm

linebreak - basic control
blank
end_par

link - hyperlink (-mapref)

s_verbatim - start verbatim mode
e_verbatim - end verbatim mode

location - location of file

eop   - end of page (manpage)
eof   - end of file

------------------------------------------------------------------------
doc2lt uses

preamble
key
synopsis
definition
postamble
