It seems the gang over at San Francisco's Planning Department has been looking at more than zoning codes on their computers - namely, porn.According to City Hall sources, Planning Director John Rahaim has recommended the firing of four high-ups - including veteran Zoning Administrator Larry Badiner - for allegedly receiving and in some cases circulating X-rated photos and videos for years.The material wasn't criminal - we're talking "Debbie Does Dallas" stuff, not child porn - but it was "incredibly inappropriate for the workplace," said one source, who would speak only on condition of anonymity because of the sensitive nature of...