Changes

Summary

1. add upgrade.txt, also cleanups before 5.7.0 (commit: 62a1113) (details)
2. update docs (commit: 80e37ea) (details)

Commit 62a1113355b0d18e1288ac9e1108f0bd0eb196f3 by rushfan add upgrade.txt, also cleanups before 5.7.0 (commit: 62a1113)
	common/output.cpp (diff)
	install/docs/whatsnew.txt (diff)
	install/docs/upgrade-5.7.0.txt
	install/gfiles/bbs.str.ini (diff)
	install/inifiles/wwiv.ini (diff)
Commit 80e37eadf23a22702992fb7c218981e7b2eec3e4 by rushfan update docs (commit: 80e37ea)
	install/docs/upgrade-5.7.0.txt
	install/docs/menu.txt (diff)
	install/docs/readme-wwiv.txt (diff)
	install/docs/upgrade.txt