doxygen misc warning

[avan989]

Describe the bug

cfe/fsw/cfe-core/src/inc/cfe_es.h:560: warning: expected tag but found TK_LNKWORD token instead!

cfe/fsw/cfe-core/src/inc/cfe_es.h:569: warning: The following parameters of CFE_ES_WaitForSystemState(uint32 MinSystemState, uint32 TimeOutMilliseconds) are not documented:
parameter 'MinSystemState'

cfe/fsw/cfe-core/src/inc/cfe_es_msg.h:750: warning: Found unknown command `\B'

cfe/fsw/cfe-core/src/inc/cfe_es_msg.h:750: warning: Found unknown command `\C'

cfe/fsw/cfe-core/src/inc/cfe_fs.h:122: warning: The following parameters of CFE_FS_InitHeader(CFE_FS_Header_t *Hdr, const char *Description, uint32 SubType) are not documented:
parameter 'Description'
parameter 'SubType'

cfe/fsw/cfe-core/src/inc/cfe_sb.h:256: warning: argument 'OptsPtr' of command @param is not found in the argument list of CFE_SB_GetPipeOpts(CFE_SB_PipeId_t PipeId, uint8 *OptPtr)

cfe/fsw/cfe-core/src/inc/cfe_sb.h:272: warning: The following parameters of CFE_SB_GetPipeOpts(CFE_SB_PipeId_t PipeId, uint8 *OptPtr) are not documented:
parameter 'OptPtr'

cfe/fsw/cfe-core/src/inc/cfe_sb_msg.h:560: warning: Illegal command \SB_PIPEOPTSEC as the argument of a \c command

To Reproduce
Steps to reproduce the behavior:

1. make usersguide

System observed on:

• Hardware
• Ubuntu 18.04
• doxygen 1.8.13, rc-6.7.0

Reporter Info
Anh Van, NASA Goddard