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

trim indents by default - fixes #317

replace -a with && in configure

fix that a broken configure file is left over when something goes wrong

fix empty dependencies element producing broken configure script - fixes #336

fix duplicate output when checking dependencies

add --init and --update options

arg attribute in option element is required

(0) -100 -14 +14 tip

mercurial