Log Message:

Code that moves/add ASSIGNMENTS to PKGPATH is separated into a separate
    script "pkg_assignments2pkgpath". One application for it is distbb.
pkg_src_summary: PKGPATH enriched with variable assignments and passed
   to pkg_src_summary may contain spaces. They should be represented
   as ~.

   Example: pkg_src_summary \
     sysutils/mc:PKG_OPTIONS.mc=-x11~-subshell~-slang~-samba~ncurses~-edit