Release v2.16.1.0

The following are the changes in this release:

    Added a new `.clang-format` file as the basis for using the
    `clang-format(1)` tool to format calc source in a consistent way.
    This code re-formatting will make it easier to work in calc v3 code
    changes in the future by making the calc source much more consistent.

    Removed `.clang-format` exclusion from `.gitignore`.

    Modified `func.c` to prevent the `clang-format(1)` tool from formatting
    the `builtins[]` table that builtin make rule in `help/Makefile` uses to
    format the `help/builtin` file.  We can live with the `builtins[]`
    table as it is today, for now.

    Add `make clang-format` make rule to top level `Makefile` and
    to the `custom/Makefile`.

    Reformatted C code as per the `clang-format(1)` and the
    `.clang-format` file: using the `make clang-format` make rule.

Author: lcn2

Makefile.config

@@ -1245,11 +1245,11 @@ EXT=
 
 # The calc version in the form of x.y.z.w
 #
-VERSION= 2.16.0.3
+VERSION= 2.16.1.0
 
 # The calc major version in the form of x.y.z
 #
-VER= 2.16.0
+VER= 2.16.1
 
 # Names of shared libraries with versions
 #

version.h

@@ -61,8 +61,8 @@
  */
 #  define MAJOR_VER 2   /* level 1: major library version */
 #  define MINOR_VER 16  /* level 2: minor library version */
-#  define MAJOR_PATCH 0 /* level 3: major software version level */
-#  define MINOR_PATCH 3 /* level 4: minor software version level */
+#  define MAJOR_PATCH 1 /* level 3: major software version level */
+#  define MINOR_PATCH 0 /* level 4: minor software version level */
 
 /*
  * Defining PERMIT_DANGEROUS_ADDRESS_ARITHMETIC is NOT supported!