improve toolchain detection

adds documentation for new toolchain attr to XSD

add toolchain attribute - relates to #346

add OpenBSD and NetBSD platform detection

prioritize clang on bsd that is not openbsd

fix tabs in toolchain.sh

add OpenBSD platform detection

allow custom line breaks in help text

add helptext descriptions for features

trim all contents by default - relates to #317

(0) -100 -10 +10 tip

mercurial