lts: remove -breaking and clarify allowed lts changes

README.md

@@ -27,24 +27,19 @@ basic details are as follows:
 6. There will be no LTS releases cut from the nodejs/io.js stream.
 7. Once a release enters LTS, no new features may be added to that release.
    Changes are limited to bug fixes, security updates, documentation updates,
-   performance improvements, etc. Semver-minor changes are only permitted if
+   certain performance improvements that can be demonstrated to not break
+   existing applications, etc. Semver-minor changes are only permitted if
    required for bug fixes. Semver-major changes are only permitted if required
    for critical security and bug fixes.
 8. Once a release moves into Maintenance mode, only ***critical*** bugs,
    ***critical*** security fixes, and documentation updates will be permitted.
 9. *semver-major* bumps are permitted *between* LTS releases. The LTS release
-   will be cut from the last release before a *semver-major* bump. The
+   will be cut from the last stable release before a *semver-major* bump. The
    implication of this is that the *semver-major* bump should be timed to
    roughly coincide with the regular yearly LTS release schedule.
-
-Note that *semver-major* changes that happen to land *within* an LTS release
-cause a *semver-minor* increase rather than a *semver-major* increase. This is
-to prevent such changes in the LTS from clashing with the master release
-stream. When *semver-major* occur, however, a `-breaking` build metadata would
-be added to the release version. For example, if the current LTS release
-version is `v4.4.1`, and a new semver-major change is required to address a
-critical security issue, the fixed LTS version would become `v4.5.0-breaking`.
-**(LTS WG and TSC members... please weigh in on this idea)**
+10. Note that while it is possible that critical security and bug fixes may
+    lead to *semver-major* changes landing within an LTS stream, such
+    situations will be rare and will land as *semver-minor* bumps.
 
 ## Example