Make improvements to redbean

- Fix Content-Type inference when file extension has number
- Remove shoddy Class A granular IP classiifcation
- Have setuid() and setgid() take effect w/o daemonization
- Make GetParams() return empty table instead of nil
- Change SetLogLevel(int) to only apply to one message
- Make SetLogLevel(int) good enough to be access_log off
- Introduce ProgramUid(int) which is same as -U INT
- Introduce ProgramGid(int) which is same as -G INT
- Introduce ProgramLogPath(str) which is same as -L PATH
- Introduce ProgramDirectory(str) which is same as -D PATH
- Introduce ProgramLogBodies(bool) which is same as -b
- Introduce ProgramLogMessages(bool) which is same as -m

net/http/http.h

@@ -206,6 +206,7 @@ int64_t ParseIp(const char *, size_t);
 int ParseForwarded(const char *, size_t, uint32_t *, uint16_t *);
 bool IsMimeType(const char *, size_t, const char *);
 ssize_t Unchunk(struct HttpUnchunker *, char *, size_t, size_t *);
+const char *FindContentType(const char *, size_t);
 
 COSMOPOLITAN_C_END_
 #endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */