Log Message:
Some fixes and improvement
 * no need USE_PKGLOCALEDIR=YES, no locale files
 * no need lex and yacc in USE_TOOLS, not using those tools.
 * change custum do-build target to empty BUILD_TARGET, to pass down
   environment variables and make flags from pkgsrc.
 * set LICENSE=gnu-gpl-v2
 * add DESTDIR support, requested by PR 40989.