* common.mk (INSTRUBY_ARGS): added --mantype to apply mdoc2man.rb
to man pages. Fixes #5598.
(do-install-nodoc, do-install-local, do-install-man,
dont-install-nodoc, dont-install-local, dont-install-man):
No longer needs --mantype.
Reported by Rainer Orth <ro AT cebitec.uni-bielefeld.de>,
patch by George Koehler <xkernigh AT netscape.net>.
merge revision(s) 33886: [Backport #5682]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@34448 b2dd03c8-39d4-4d8f-98ff-823fe69b080e