strrev - reverse a string in place

       Lars Wirzenius (lars.wirzenius@helsinki.fi)

Publib                                        C Programmer's Manual                                 STRREV(3pub)

       Does not automatically detect palindromes, nor automatically return without doing anything.

strrev  reverses  the  argument string in place, i.e., it swaps the ith character from the beginning with
       the ith character from the end.

       Reversing "dlrow, elloh" would be done like the following.

            char str[] = "dlrow, elloh";

            puts(strrev(str));

       This would output "hello, world".  Note that using the string literal as the argument would be an  error,
       since it is not allowable to modify string literals.

       strrev - reverse a string in place

strrev returns its argument.

publib(3), memrev(3)

       #include <publib.h>
       char *strrev(char *str);