strzap - remove pattern from beginning of string, if it is there

       Lars Wirzenius (lars.wirzenius@helsinki.fi)

Publib                                        C Programmer's Manual                                 STRZAP(3pub)

strzap  compares the beginning of str with all of pat, and if they are the same, it removes the beginning
       from str.

       strzap - remove pattern from beginning of string, if it is there

strzap returns non-zero if it removed anything, 0 if not.

publib(3), strendzap(3)

       #include <publib.h>
       int strzap(char *str, const char *pat);