fix 339156 - gdbsrv not called for fatal signal

In preparation for removing --db-attach=yes, call gdbserver
for a fatal signal (where --db-attach=yes is also calling gdb)



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14556 a5019735-40e9-0310-863c-91ae7b9d1cf9
Remove anouncement of helgrind dead in coregrind/m_debuginfo/README.txt
as helgrind died many years ago, but resuscitate since then.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14557 a5019735-40e9-0310-863c-91ae7b9d1cf9
Handle explicitely all enum values in 'switch' on AddrInfo tag
(reported by Florian)

Note that Addr_Undescribed will cause an assert if such
an undescribed addrinfo is pretty printed, as normally
such addrinfo should always be described before being pretty printed.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14558 a5019735-40e9-0310-863c-91ae7b9d1cf9
Fix wrong checking of ARG2 of getrlimit
(spotted by Florian Krohm/IBM's BEAM checker)



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14559 a5019735-40e9-0310-863c-91ae7b9d1cf9