The pblock_nvinsert function creates a new entry with a given name and character value in the specified pblock. The name and value parameters are copied.
Parameter names are case sensitive. By convention, lowercase names are used for parameters that correspond to HTTP header fields.
pb_param *pblock_nvinsert(char *name, char *value, pblock *pb);
A pointer to the newly allocated pb_param structure.
char *name is the name of the new entry.
char *value is the string value of the new entry.
pblock *pb is the pblock into which the insertion occurs.
pblock_nvinsert("content-type", "text/html", rq->srvhdrs);