Include autoconf.h (either directly or via proxy) before system
headers, so that feature test macros defined there can affect the
system namespace.  Where include order was changed, eliminate some
redundant or unnecessary includes.

ticket: 7961

Where we have ATHENA.MIT.EDU stanzas in sample or test krb5.conf files
which define kdc entries, also define a master_kdc entry.  Remove
default_domain and v4_instance_convert entries in examples as they are
only needed for krb5/krb4 principal conversions.  In the krb5_conf.rst
example, remove enctype specifications as we don't want to encourage
their use when they aren't necessary, and remove a redundant
domain_realm entry.

ticket: 7901 (new)

Some applications write a profile file and then immediately use it via
a krb5_context.  If we have a cached copy of the profile we wrote,
make sure to update it by forcing a stat when we reuse an existing
prf_data_t object.

[ghudson@mit.edu: commit message]

ticket: 7884

Directly use stdint.h names for integer types in preference to the
various internal names we have made up for them.

Make unconditional use of <stdint.h> and fixed-width types such as
uint32_t.  k5-plugin.h doesn't use any special integer types, so
remove the conditional include block there.  Nothing uses
INT64_FMT/UINT64_FMT, so leave those out of k5-platform.h for now.

$(BUILDTOP)/include/profile.h was being updated by two different
rules, which could collide with make -j.  Use a dependency from
includes instead of a redundant rule.

This fixes a long-standing documentation bug where we claimed that
a domain_realm mapping for a host name would not affect entries
under that domain name.  The code has always had the behavior where
a host name mapping implies the corresponding domain name mapping,
since the 1.0 release.

While here, replace media-lab with csail in example files, as the
media lab realm is no longer in use.  Also strip port 88 from KDC
specifications, and drop the harmful default_{tgs,tkt}_enctypes
lines from src/util/profile/krb5.conf.

Further cleanup on these files to remove defunct realms may be in order.

ticket: 7690 (new)
tags: pullup
target_version: 1.11.4

Provide default values in pre.in for PROG_LIBPATH, PROG_RPATH,
SHLIB_DIRS, SHLIB_RDIRS, and STOBJLISTS so that they don't have to be
specified in the common case.  Rename KRB5_RUN_ENV and KRB5_RUN_VARS
to RUN_SETUP (already the most commonly used name) and RUN_VARS.  Make
sure to use DEFINES for local defines (not DEFS).  Remove some other
unnecessary makefile content.

Locking and unlocking a non-recursive mutex is a simple memory
operation and should not fail on any reasonable platform with correct
usage.  A pthread mutex can return EDEADLK on lock or EPERM on unlock,
or EINVAL if the mutex is uninitialized, but all of these conditions
would reflect serious bugs in the calling code.

Change the k5_mutex_lock and k5_mutex_unlock wrappers to return void
and adjust all call sites.  Propagate this change through
k5_cc_mutex_lock and k5_cc_mutex_unlock as well.