0.11.0 --- the keystrokes this kernel keeps for itself are a position now - #22
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… now openkal 0.14 adds KAL_TERM_PASS_CONTROL, and this implementation reads and writes it. The mapping is the one the other termios kernel uses with this kernel's own constants: ISIG, IXON and IEXTEN together, because the position states that NO keystroke is reserved and an implementation mapping ISIG alone would leave one mode word meaning two things on two systems. A position whose requested value is the one in effect is not written, which the specification states beside set_mode and which matters here because this position stands for three flags. And with line assembly off the least number of bytes a read waits for is established, so that a terminal left at VMIN=0 does not make kal_stream_read report the end of an input that has not ended (clause 7.4).
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跟随 openkal 0.14（mcpplibs/openkal#38）：模式字第三个位
KAL_TERM_PASS_CONTROL的读写，以及规范在set_mode旁新增的两条规则。ISIG|IXON|IEXTEN；console:ENABLE_PROCESSED_INPUT），否则同一个模式字在两个系统上含义不同。kal_stream_read会报出一个不是输入结束的 0（条款 7.4）。依赖：openkal 0.14.0。各仓库同名分支
openkal-0.14，CI 会检出同名规范分支。端到端验证（^C以 0x03 到达、^S不冻结、恢复后终端回到原样）在 openkal-musl 的 pty 探针里与宿主 C 库对照。