ref: d63fbe6cd5e055b40ae8e4aa209b9aef07074f8b
dir: /fns.h/
void *emalloc(ulong); void *erealloc(void*, ulong); Image *eallocimage(Display*, Rectangle, ulong, int, ulong); int Sfmt(Fmt*); void SIPfmtinstall(void); void addheader(Hdrtab*, char*, char*); Hdr *getheader(Hdrtab*, char*); void delheader(Hdrtab*, char*); void delheaders(Hdrtab*); Sipmsg *newsipmsg(void); void delsipmsg(Sipmsg*); Sip *mksip(int); void rmsip(Sip*);