Stabilize -Z strip as -C strip

Leave -Z strip available temporarily as an alias, to avoid breaking
cargo until cargo transitions to using -C strip. (If the user passes
both, the -C version wins.)

src/doc/rustc/src/codegen-options/index.md

@@ -525,6 +525,22 @@ platforms. Possible values are:
 Note that `packed` and `unpacked` are gated behind `-Z unstable-options` on
 non-macOS platforms at this time.
 
+## strip
+
+The option `-C strip=val` controls stripping of debuginfo and similar auxiliary
+data from binaries during linking.
+
+Supported values for this option are:
+
+- `none` - debuginfo and symbols (if they exist) are copied to the produced
+  binary or separate files depending on the target (e.g. `.pdb` files in case
+  of MSVC).
+- `debuginfo` - debuginfo sections and debuginfo symbols from the symbol table
+  section are stripped at link time and are not copied to the produced binary
+  or separate files.
+- `symbols` - same as `debuginfo`, but the rest of the symbol table section is
+  stripped as well if the linker supports it.
+
 ## target-cpu
 
 This instructs `rustc` to generate code specifically for a particular processor.

src/doc/unstable-book/src/compiler-flags/strip.md

@@ -1,17 +0,0 @@
-# `strip`
-
-The tracking issue for this feature is: [#72110](https://github.com/rust-lang/rust/issues/72110).
-
-------------------------
-
-Option `-Z strip=val` controls stripping of debuginfo and similar auxiliary data from binaries
-during linking.
-
-Supported values for this option are:
-
-- `none` - debuginfo and symbols (if they exist) are copied to the produced binary or separate files
-depending on the target (e.g. `.pdb` files in case of MSVC).
-- `debuginfo` - debuginfo sections and debuginfo symbols from the symbol table section
-are stripped at link time and are not copied to the produced binary or separate files.
-- `symbols` - same as `debuginfo`, but the rest of the symbol table section is stripped as well
-if the linker supports it.