KRB5: Enable MIT KRB5 by default

Set WITH_MITKRB5=yes as the default.

Rebuild all USES=gssapi ports is recommended.

A clean buildworld is required.

Relnotes:	yes

UPDATING

@@ -27,6 +27,11 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 15.x IS SLOW:
 	world, or to merely disable the most expensive debugging functionality
 	at runtime, run "ln -s 'abort:false,junk:false' /etc/malloc.conf".)
 
+20250721:
+	WITH_MITKRB5 is now enabled by default. MIT KRB5 has replaced
+	Heimdal in base. Ports that use USES=gssapi must be rebuilt.
+	A clean buildworld is required.
+
 20250719:
 	Commits 392a82b225 and c00baac0ab both changed the
 	internal API between the NFS modules.  As such, all

share/mk/src.opts.mk

@@ -143,6 +143,7 @@ __DEFAULT_YES_OPTIONS = \
     MAIL \
     MAILWRAPPER \
     MAKE \
+    MITKRB5 \
     MLX5TOOL \
     NETCAT \
     NETGRAPH \
@@ -211,7 +212,6 @@ __DEFAULT_NO_OPTIONS = \
     LOADER_VERIEXEC_PASS_MANIFEST \
     LLVM_FULL_DEBUGINFO \
     MALLOC_PRODUCTION \
-    MITKRB5 \
     OFED_EXTRA \
     OPENLDAP \
     REPRODUCIBLE_BUILD \

sys/sys/param.h

@@ -74,7 +74,7 @@
  * cannot include sys/param.h and should only be updated here.
  */
 #undef __FreeBSD_version
-#define __FreeBSD_version 1500053
+#define __FreeBSD_version 1500054
 
 /*
  * __FreeBSD_kernel__ indicates that this system uses the kernel of FreeBSD,