If xrootd client runs against a server that enforces both encryption and request signing, it crashes on exit due to static deinitialization fiasco:
```
$ ./xrdcp -f Makefile roots://slc7-test.cern.ch//tmp
[57.49kB/57.49kB][100%][==================================================][57.49kB/s]
=================================================================
==31590==ERROR: AddressSanitizer: heap-use-after-free on address 0x6190000185f0 at pc 0x7fe60b292cc5 bp 0x7fff18451570 sp 0x7fff18451560
READ of size 8 at 0x6190000185f0 thread T0
#0 0x7fe60b292cc4 in XrdOucHash<XrdCryptoX509Crl>::Find(char const*, long*) /home/simonm/xrootd/src/./XrdOuc/XrdOucHash.icc:173
#1 0x7fe60b26d3d0 in GSIStack<XrdCryptoX509Crl>::Del(XrdCryptoX509Crl*) /home/simonm/xrootd/src/./XrdSecgsi/XrdSecProtocolgsi.hh:265
#2 0x7fe60b26d3d0 in gsiHSVars::~gsiHSVars() /home/simonm/xrootd/src/./XrdSecgsi/XrdSecProtocolgsi.hh:534
#3 0x7fe60b26d3d0 in XrdSecProtocolgsi::Delete() /home/simonm/xrootd/src/XrdSecgsi/XrdSecProtocolgsi.cc:1069
#4 0x7fe616706e83 in XrdCl::XRootDTransport::CleanUpAuthentication(XrdCl::XRootDChannelInfo*) /home/simonm/xrootd/src/XrdCl/XrdClXRootDTransport.cc:2526
#5 0x7fe6167076a2 in XrdCl::XRootDTransport::CleanUpProtection(XrdCl::XRootDChannelInfo*) /home/simonm/xrootd/src/XrdCl/XrdClXRootDTransport.cc:2549
#6 0x7fe61670f388 in XrdCl::XRootDTransport::Disconnect(XrdCl::AnyObject&, unsigned short) /home/simonm/xrootd/src/XrdCl/XrdClXRootDTransport.cc:1409
#7 0x7fe61690dbec in XrdCl::AsyncSocketHandler::Close() /home/simonm/xrootd/src/XrdCl/XrdClAsyncSocketHandler.cc:188
#8 0x7fe6166d37a0 in XrdCl::Stream::Disconnect(bool) /home/simonm/xrootd/src/XrdCl/XrdClStream.cc:350
#9 0x7fe6166da782 in XrdCl::Stream::~Stream() /home/simonm/xrootd/src/XrdCl/XrdClStream.cc:139
#10 0x7fe6166cee2b in XrdCl::Channel::~Channel() /home/simonm/xrootd/src/XrdCl/XrdClChannel.cc:136
#11 0x7fe6166c098f in XrdCl::PostMaster::Finalize() /home/simonm/xrootd/src/XrdCl/XrdClPostMaster.cc:151
#12 0x7fe616660a78 in XrdCl::DefaultEnv::Finalize() /home/simonm/xrootd/src/XrdCl/XrdClDefaultEnv.cc:738
#13 0x7fe61507c059 in __cxa_finalize (/lib64/libc.so.6+0x3a059)
#14 0x7fe61661e432 (/home/simonm/xrootd/build/src/XrdCl/libXrdCl.so.3+0x2a7432)
0x6190000185f0 is located 1136 bytes inside of 1152-byte region [0x619000018180,0x619000018600)
freed by thread T0 here:
#0 0x7fe616e39508 in __interceptor_free (/lib64/libasan.so.4+0xde508)
#1 0x7fe60b290a3f in XrdOucHash<XrdCryptoX509Crl>::~XrdOucHash() /home/simonm/xrootd/src/./XrdOuc/XrdOucHash.hh:186
#2 0x7fe60b290a3f in GSIStack<XrdCryptoX509Crl>::~GSIStack() /home/simonm/xrootd/src/./XrdSecgsi/XrdSecProtocolgsi.hh:253
previously allocated by thread T1 here:
#0 0x7fe616e39a88 in __interceptor_calloc (/lib64/libasan.so.4+0xdea88)
#1 0x7fe60b24b4c0 in XrdOucHash<XrdCryptoX509Crl>::XrdOucHash(int, int, int) /home/simonm/xrootd/src/./XrdOuc/XrdOucHash.icc:52
#2 0x7fe60b24b4c0 in GSIStack<XrdCryptoX509Crl>::GSIStack() /home/simonm/xrootd/src/./XrdSecgsi/XrdSecProtocolgsi.hh:253
#3 0x7fe60b24b4c0 in __static_initialization_and_destruction_0 /home/simonm/xrootd/src/XrdSecgsi/XrdSecProtocolgsi.cc:199
#4 0x7fe60b24b4c0 in _GLOBAL__sub_I_XrdSecProtocolgsi.cc /home/simonm/xrootd/src/XrdSecgsi/XrdSecProtocolgsi.cc:5807
Thread T1 created by T0 here:
#0 0x7fe616d92a7f in pthread_create (/lib64/libasan.so.4+0x37a7f)
#1 0x7fe615ce252d in XrdSysThread::Run(unsigned long*, void* (*)(void*), void*, int, char const*) /home/simonm/xrootd/src/XrdSys/XrdSysPthread.cc:323
SUMMARY: AddressSanitizer: heap-use-after-free /home/simonm/xrootd/src/./XrdOuc/XrdOucHash.icc:173 in XrdOucHash<XrdCryptoX509Crl>::Find(char const*, long*)
Shadow bytes around the buggy address:
0x0c327fffb060: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c327fffb070: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c327fffb080: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c327fffb090: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c327fffb0a0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
=>0x0c327fffb0b0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd[fd]fd
0x0c327fffb0c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c327fffb0d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c327fffb0e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c327fffb0f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c327fffb100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==31590==ABORTING
```
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