revert(3p/git): Revert merge of git upstream at v2.26.2 r/852

This causes cgit to serve error pages, which is undesirable.

This reverts commit 5229c9b232de5bfa959ad6ebbb4c8192ac513352, reversing
changes made to f2b211131f2347342dde63975b09cf603149f1a3.

1 files changed, 0 insertions, 45 deletions

diff --git a/third_party/git/sigchain.h b/third_party/git/sigchain.h
index 8e6bada8928c..138b20f54b40 100644
--- a/third_party/git/sigchain.h
+++ b/third_party/git/sigchain.h
@@ -1,57 +1,12 @@
 #ifndef SIGCHAIN_H
 #define SIGCHAIN_H
 
-/**
- * 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.
- */
 typedef void (*sigchain_fun)(int);
 
-/* You can sigchain_push and sigchain_pop individual signals. */
 int sigchain_push(int sig, sigchain_fun f);
 int sigchain_pop(int sig);
 
-/**
- * push the handler onto the stack for the common signals:
- * SIGINT, SIGHUP, SIGTERM, SIGQUIT and SIGPIPE.
- */
 void sigchain_push_common(sigchain_fun f);
-
 void sigchain_pop_common(void);
 
 #endif /* SIGCHAIN_H */