Browsing Slovak translation

637.

Conditional processing in input:
--ifdocbook process @ifdocbook and @docbook even if
not generating Docbook.
--ifhtml process @ifhtml and @html even if not generating HTML.
--ifinfo process @ifinfo even if not generating Info.
--ifplaintext process @ifplaintext even if not generating plain text.
--iftex process @iftex and @tex.
--ifxml process @ifxml and @xml.
--no-ifdocbook do not process @ifdocbook and @docbook text.
--no-ifhtml do not process @ifhtml and @html text.
--no-ifinfo do not process @ifinfo text.
--no-ifplaintext do not process @ifplaintext text.
--no-iftex do not process @iftex and @tex text.
--no-ifxml do not process @ifxml and @xml text.

Also, for the --no-ifFORMAT options, do process @ifnotFORMAT text.