Merge tag 'v2.25.0-rc0' into git-po-master

Git 2.25-rc0

* tag 'v2.25.0-rc0': (531 commits)
  Git 2.25-rc0
  sparse-checkout: improve OS ls compatibility
  dir.c: use st_add3() for allocation size
  dir: consolidate similar code in treat_directory()
  dir: synchronize treat_leading_path() and read_directory_recursive()
  dir: fix checks on common prefix directory
  t4015: improve coverage of function context test
  commit: forbid --pathspec-from-file --all
  t3434: mark successful test as such
  notes.h: fix typos in comment
  t6030: don't create unused file
  t5580: don't create unused file
  t3501: don't create unused file
  bisect--helper: convert `*_warning` char pointers to char arrays.
  The sixth batch
  fix-typo: consecutive-word duplications
  Makefile: drop GEN_HDRS
  built-in add -p: show helpful hint when nothing can be staged
  built-in add -p: only show the applicable parts of the help text
  built-in add -p: implement the 'q' ("quit") command
  ...

1 files changed, 0 insertions, 41 deletions

diff --git a/Documentation/technical/api-sigchain.txt b/Documentation/technical/api-sigchain.txt
deleted file mode 100644
index 9e1189ef01..0000000000
--- a/Documentation/technical/api-sigchain.txt
+++ /dev/null
@@ -1,41 +0,0 @@
-sigchain API
-============
-
-Code often wants to set a signal handler to clean up temporary files or
-other work-in-progress when we die unexpectedly. For multiple pieces of
-code to do this without conflicting, each piece of code must remember
-the old value of the handler and restore it either when:
-
-  1. The work-in-progress is finished, and the handler is no longer
-     necessary. The handler should revert to the original behavior
-     (either another handler, SIG_DFL, or SIG_IGN).
-
-  2. The signal is received. We should then do our cleanup, then chain
-     to the next handler (or die if it is SIG_DFL).
-
-Sigchain is a tiny library for keeping a stack of handlers. Your handler
-and installation code should look something like:
-
-------------------------------------------
-  void clean_foo_on_signal(int sig)
-  {
-	  clean_foo();
-	  sigchain_pop(sig);
-	  raise(sig);
-  }
-
-  void other_func()
-  {
-	  sigchain_push_common(clean_foo_on_signal);
-	  mess_up_foo();
-	  clean_foo();
-  }
-------------------------------------------
-
-Handlers are given the typedef of sigchain_fun. This is the same type
-that is given to signal() or sigaction(). It is perfectly reasonable to
-push SIG_DFL or SIG_IGN onto the stack.
-
-You can sigchain_push and sigchain_pop individual signals. For
-convenience, sigchain_push_common will push the handler onto the stack
-for many common signals.