Revert accidental deletion killing %?STRING (re: b590a9f1)
build: ksh93: add more missing header dependencies to feature tests
build: fix dependencies on SHOPT.sh (re: 808fa34b)
build: create a development build more selectively (re: beb4f1ca)
Fix leftover memory leak (re: 90fb14f6)
libast/tm: Fix memory leaks in tmlocal() (re: 580bc2d9, 9f43f8d1)
Simplify and optimise stkcopy() (re: 78799a3c)
Fix use after free when an alias redefines itself (re: e20db012)