Info about boots' ability to hold knives

[Night-Pryanik]

I think we should give information to players about boots' ability to hold knives in item description. I played a lot and learned about it totally by chance (looking at second screenshot at this (http://smf.cataclysmdda.com/index.php?topic=5745.msg226556#msg226556) post) because there is no other source of information about it.
3 variants of doing it:

• Manually add text like "You can hold a knife in this footwear" to every footwear description;
• Make a flag like [BOOTS] and add aforementioned text to this flag, then add this flag to all appropriate footwear;
• Add check for iuse_function_list["BOOTS"] or iuse::boots (don't know what is better and if it even possible) in item.cpp with aforementioned text.

[graysage1]

Yes please, assuming that screen cap isn't a fluke, lol. In general informing the player seems to be a recurrent theme in some of these issues.

Can all boots do this or just the military?

[Night-Pryanik]

All boots with "use_action" : "BOOTS" string in item.cpp can do this.
I made it myself by going the second way (made a flag "BOOTS", then added this flag to all appropriate footwear, then added text with check for this flag in item.cpp). PR'ed (#11566)