port to termux (all, some or maybe just ed(1)) #726
Description
I was hoping to get the b/B (browser forward/reverse) out of ed(1) in plan9port but had trouble building on termux.
Got things building and fixed up ed(1) to use an available temp file to start with.
Here is my working branch: https://github.com/craigcomstock/plan9port/tree/termux-focused-on-ed
I see rc is available via termux packages (or was). Maybe I will just package p9ed but it might be fun to get a few more things ported.
Let me know if there is an easier way to get around redefinition troubles I had with things like getc, stdout, etc...
Some of my branch can probably be used, like adjustments to use "command -v" instead of "which" and a few other bits...