NAME
hash_crc32 - 32 bit cyclic redundancy code
SYNOPSIS
int hash_crc32(string str, string extra...)
DESCRIPTION
Compute the 32 bit Cyclic Redundancy Code of the concatenation of all
string arguments, with polynomial:
x^32 + x^26 + x^23 + x^22 + x^16 + x^12 + x^11 + x^10 + x^8 +
x^7 + x^5 + x^4 + x^2 + x + 1