Adjust Makefile to get rid of '.sp' sequences in asciidoc manpages. [Closes: issue567] v1.1.17
drwxr-xr-x - compile
drwxr-xr-x - debian
drwxr-xr-x - doc
-rw-r--r-- 281 makefile.postfix
drwxr-xr-x - manpages
drwxr-xr-x - usr_bin
drwxr-xr-x - usr_sbin
drwxr-xr-x - usr_share