[DONE] Search by category and/or edition?

There is no search option by category and edition right now.
I can implement both. Maybe i can do that sometime soon in priority to other things.

There are still modifiers which are not available for the quick access on the main page:

redump.org/discs/system/psx/edc/keyword/ > keyword: yes|no|unknown
redump.org/discs/system/psx/libcrypt/keyword/ > keyword: 0|1|2 (0=unknown, 1=no, 2=yes) needs optimization
redump.org/discs/system/psx/antimodchip/keyword/ > keyword: 0|1|2 (0=unknown, 1=no, 2=yes) needs optimization
redump.org/discs/title/keywords/ > keywords: separated by "-"
redump.org/discs/serial/keywords/ > keywords: separated by "-" needs a fix
redump.org/discs/offset/keyword/ > keyword: -647|0|2 needs a fix
redump.org/discs/language/keyword/ > keyword: eng|fre|ger|etc. > ISO 639-2/B
redump.org/discs/tracks/keyword/ > keyword: 1|...|99 (only cd based)
redump.org/discs/media/keyword/ > keyword: cd|dvd
redump.org/discs/media/cd/securom/keyword/ > keyword: 0|1 (0=securom data not set, 1=securom data set) needs optimization

There are some more, i will list them later as soon as i find time.

Edit 1:
redump.org/discs/category/keyword/ > keyword: games|demos|... (only supported editions, can be lower or any case)
redump.org/discs/edition/keywords/ > keywords: separated by ","

Edit 2:
redump.org/discs/quicksearch/TEXT/comments/only
redump.org/discs/quicksearch/TEXT/contents/only

redump.org/discs/category/keyword/ > keyword: games|demos|... (only supported editions, can be lower or any case)

Games
Demos
Video
Audio
Multimedia
Applications
Coverdiscs
Educational
Bonus Discs
Preproduction
Add-Ons