example MAKE_ENV+=FOO=${BAR} is changed to MAKE_ENV+=FOO=${BAR:Q}. Some other changes are outlined in http://mail-index.netbsd.org/tech-pkg/2005/12/02/0034.html
PL/Tcl is a dynamic loadable extension for the PostgreSQL database system that enables the Tcl language to be used to create functions and trigger-procedures. It offers most of the capabilities a function writer has in the C language.