CMake command docs say to use 0 for missing SHA512 (#18611)

docs/maintainers/vcpkg_from_bitbucket.md

@@ -35,7 +35,7 @@ If `REF` is specified, `SHA512` must also be specified.
 ### SHA512
 The SHA512 hash that should match the archive (https://bitbucket.com/${REPO}/get/${REF}.tar.gz).
 
-This is most easily determined by first setting it to `1`, then trying to build the port. The error message will contain the full hash, which can be copied back into the portfile.
+This is most easily determined by first setting it to `0`, then trying to build the port. The error message will contain the full hash, which can be copied back into the portfile.
 
 ### HEAD_REF
 The unstable git commit-ish (ideally a branch) to pull for `--head` builds.

docs/maintainers/vcpkg_from_github.md

@@ -38,7 +38,7 @@ If `REF` is specified, `SHA512` must also be specified.
 ### SHA512
 The SHA512 hash that should match the archive (https://github.com/${REPO}/archive/${REF}.tar.gz).
 
-This is most easily determined by first setting it to `1`, then trying to build the port. The error message will contain the full hash, which can be copied back into the portfile.
+This is most easily determined by first setting it to `0`, then trying to build the port. The error message will contain the full hash, which can be copied back into the portfile.
 
 ### HEAD_REF
 The unstable git commit-ish (ideally a branch) to pull for `--head` builds.

docs/maintainers/vcpkg_from_gitlab.md

@@ -42,7 +42,7 @@ If `REF` is specified, `SHA512` must also be specified.
 The SHA512 hash that should match the archive (${GITLAB_URL}/${REPO}/-/archive/${REF}/${REPO_NAME}-${REF}.tar.gz).
 The REPO_NAME variable is parsed from the value of REPO.
 
-This is most easily determined by first setting it to `1`, then trying to build the port. The error message will contain the full hash, which can be copied back into the portfile.
+This is most easily determined by first setting it to `0`, then trying to build the port. The error message will contain the full hash, which can be copied back into the portfile.
 
 ### HEAD_REF
 The unstable git commit-ish (ideally a branch) to pull for `--head` builds.

docs/maintainers/vcpkg_from_sourceforge.md

@@ -48,6 +48,8 @@ The REPO is `soxr`, REF is not exist, and the FILENAME is `soxr-0.1.3-Source.tar
 ### SHA512
 The SHA512 hash that should match the archive.
 
+This is most easily determined by first setting it to `0`, then trying to build the port. The error message will contain the full hash, which can be copied back into the portfile.
+
 ### WORKING_DIRECTORY
 If specified, the archive will be extracted into the working directory instead of `${CURRENT_BUILDTREES_DIR}/src/`.
 

scripts/cmake/vcpkg_from_bitbucket.cmake

@@ -34,7 +34,7 @@ If `REF` is specified, `SHA512` must also be specified.
 ### SHA512
 The SHA512 hash that should match the archive (https://bitbucket.com/${REPO}/get/${REF}.tar.gz).
 
-This is most easily determined by first setting it to `1`, then trying to build the port. The error message will contain the full hash, which can be copied back into the portfile.
+This is most easily determined by first setting it to `0`, then trying to build the port. The error message will contain the full hash, which can be copied back into the portfile.
 
 ### HEAD_REF
 The unstable git commit-ish (ideally a branch) to pull for `--head` builds.

scripts/cmake/vcpkg_from_github.cmake

@@ -37,7 +37,7 @@ If `REF` is specified, `SHA512` must also be specified.
 ### SHA512
 The SHA512 hash that should match the archive (https://github.com/${REPO}/archive/${REF}.tar.gz).
 
-This is most easily determined by first setting it to `1`, then trying to build the port. The error message will contain the full hash, which can be copied back into the portfile.
+This is most easily determined by first setting it to `0`, then trying to build the port. The error message will contain the full hash, which can be copied back into the portfile.
 
 ### HEAD_REF
 The unstable git commit-ish (ideally a branch) to pull for `--head` builds.

scripts/cmake/vcpkg_from_gitlab.cmake

@@ -41,7 +41,7 @@ If `REF` is specified, `SHA512` must also be specified.
 The SHA512 hash that should match the archive (${GITLAB_URL}/${REPO}/-/archive/${REF}/${REPO_NAME}-${REF}.tar.gz).
 The REPO_NAME variable is parsed from the value of REPO.
 
-This is most easily determined by first setting it to `1`, then trying to build the port. The error message will contain the full hash, which can be copied back into the portfile.
+This is most easily determined by first setting it to `0`, then trying to build the port. The error message will contain the full hash, which can be copied back into the portfile.
 
 ### HEAD_REF
 The unstable git commit-ish (ideally a branch) to pull for `--head` builds.

scripts/cmake/vcpkg_from_sourceforge.cmake

@@ -47,6 +47,8 @@ The REPO is `soxr`, REF is not exist, and the FILENAME is `soxr-0.1.3-Source.tar
 ### SHA512
 The SHA512 hash that should match the archive.
 
+This is most easily determined by first setting it to `0`, then trying to build the port. The error message will contain the full hash, which can be copied back into the portfile.
+
 ### WORKING_DIRECTORY
 If specified, the archive will be extracted into the working directory instead of `${CURRENT_BUILDTREES_DIR}/src/`.