CMake Nightly Date Stamp
strings: Remove redundant calls to std::string::c_str()

Replacements were detected and performed by the clang tool
remove-cstr-calls on a linux build.
Merge topic 'remove-redundant-c_str' into next

cc1139cc strings: Remove redundant calls to std::string::c_str()
1b3495d3 CMake Nightly Date Stamp