(ITS#7022) Patch - Mozilla NSS - NSS_Init* functions are not thread safe

[rmeggins@redhat.com]

Full_Name: Rich Megginson
Version: current tip of master branch
OS: RHEL6
URL: ftp://ftp.openldap.org/incoming/0001-NSS_Init-functions-are-not-thread-safe.patch
Submission from: (NULL) (76.26.104.137)


The NSS_InitContext et. al, and their corresponding shutdown functions,
are not thread safe.  There can only be one thread at a time calling
these functions.  Protect the calls with a mutex.  Create the mutex
using a PR_CallOnce to ensure that the mutex is only created once and
not used before created.  Move the registration of the nss shutdown
callback to also use a PR_CallOnce.  Removed the call to
SSL_ClearSessionCache() because it is always called at shutdown, and we must
not call it more than once.

These patch files are derived from OpenLDAP Software. All of the
modifications to OpenLDAP Software represented in the following
patch(es) were developed by Red Hat. Red Hat has not assigned rights
and/or interest in this work to any party. I, Rich Megginson am
authorized by Red Hat, my employer, to release this work under the
following terms.

Red Hat hereby place the following modifications to OpenLDAP Software
(and only these modifications) into the public domain. Hence, these
modifications may be freely used and/or redistributed for any purpose
with or without attribution and/or other notice.