Don’t change signal mask in library code

This belongs in main(), where it is already being set.

It might however be necessary to set it when running tests, although none of the tests seems to fail w/o this.

Frameworks/document/src/watch.cc

@@ -225,7 +225,6 @@ namespace document
 	{
 		oak::set_thread_name("document::watch_server_t");
 
-		signal(SIGPIPE, SIG_IGN);
 		event_queue = kqueue();
 
 		struct kevent changeList;

Frameworks/network/src/tbz.cc

@@ -13,8 +13,6 @@ namespace network
 	{
 		if(io::process_t process = io::spawn(std::vector<std::string>{ "/usr/bin/tar", "-jxmkC", dest.c_str(), "--strip-components", "1" }))
 		{
-			signal(SIGPIPE, SIG_IGN);
-
 			input  = process.in;
 			output = process.out;